Give me your honest opinion

Are those the prices you are going to pay? At those numbers both the 8600k and 8700 are cheaper and better. A Z motherboard is required for overclocking, Z270 for the 7700k and Z370 for 8600k.
The cryorig H7 for much the same price outperforms a hyper 212 and is much more capable of handling an overclocked cpu or a 6 core but you'd want better if pushing it.
 
Jamz, He's CA, Canadian. The 8700 isn't cheaper, though the 8600K is. I'd move to that. For gaming, the 6C/6T found in the 8600K does better than the 4C/8T found in the 7700K.

https://www.tomshardware.com/reviews/intel-coffee-lake-core-i5-8600k-cpu,5264-12.html

OC'd they perform very similar. Stock the 8600K is ahead. In either case the 8600K is cheaper. Not really a point to get the 7700K unless you can get one cheap.
 
CAD$50 gets an 8700k vrs the 7700k, which won't need OC unless op wants to, and with its thread count offers a considerable possibility of much longer usable lifespan than the 6c/6t 8600k. The i7's clocks and ability will also make better use of the 144Hz monitor. The Z370 Gaming is CAD$5 cheaper than the Z270 version. For CAD$45, that's a no brainer in my book for a considerable jump in performance and ability.
 


Or the i7-8700, which will perform nearly identical to an 8700K at stock clocks, with only a 0.1 Ghz difference in boost clocks between them. The 8700K is unlocked for overclocking, while the 8700 is not, but you're likely going to need a much higher-end cooler to get any sort of substantial overclock out of it, and even then, the performance benefits in games will be minimal. You could also go with a less-expensive B360 motherboard, since you wouldn't be overclocking. Even if you replace the 8700's underwhelming stock cooler with something more substantial, an overclocked 8700K setup would likely cost you around $100 more.
 
True, hyper212 on a 8700k is good for stock clocks, I'd not attempt OC with it, but. There's always next month or a few months where op might decide to go for some OC, and coming up with a little bit of cash for a better cooler is far easier than getting bumped out of the whole possibility by a locked cpu on a B board.
 
Btw, i havent bought the system yet, only the case. I was thinking of taking the i7-7700k and msi z270 gaming plus instead of what I had prior as the z370 and i-7-8700K/8700 are both more expensive and apparently are better at multi threading tasks but dont have that big of a difference when it comes to gaming. Does that seem like a good choice to make?
 
[PCPartPicker part list](https://ca.pcpartpicker.com/list/PZKs8Y) / [Price breakdown by merchant](https://ca.pcpartpicker.com/list/PZKs8Y/by_merchant/)

Type|Item|Price
:----|:----|:----
**CPU** | [Intel - Core i7-8700K 3.7GHz 6-Core Processor](https://ca.pcpartpicker.com/product/sxDzK8/intel-core-i7-8700k-37ghz-6-core-processor-bx80684i78700k) | $449.00 @ Amazon Canada
**CPU Cooler** | [Cooler Master - Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler](https://ca.pcpartpicker.com/product/hmtCmG/cooler-master-cpu-cooler-rr212e20pkr2) | $36.25 @ Vuugo
**Motherboard** | [ASRock - Z370 Pro4 ATX LGA1151 Motherboard](https://ca.pcpartpicker.com/product/39hj4D/asrock-z370-pro4-atx-lga1151-motherboard-z370-pro4) | $115.50 @ Vuugo
**Memory** | [G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory](https://ca.pcpartpicker.com/product/qGqbt6/gskill-memory-f43200c16d16gvgb) | $221.99 @ Newegg Canada
**Storage** | [Team - L5 LITE 3D 240GB 2.5" Solid State Drive](https://ca.pcpartpicker.com/product/vYQG3C/team-l5-lite-3d-240gb-25-solid-state-drive-t253td240g3c101) | $67.99 @ Amazon Canada
**Storage** | [Seagate - FireCuda 1TB 3.5" 7200RPM Hybrid Internal Hard Drive](https://ca.pcpartpicker.com/product/n28H99/seagate-firecuda-1tb-35-7200rpm-hybrid-internal-hard-drive-st1000dx002) | $92.50 @ Vuugo
**Video Card** | [Gigabyte - GeForce GTX 1080 8GB WINDFORCE OC 8G Video Card](https://ca.pcpartpicker.com/product/V4M323/gigabyte-geforce-gtx-1080-8gb-windforce-oc-8g-video-card-gv-n1080wf3oc-8gd) | $677.98 @ Amazon Canada
**Case** | [Rosewill - RISE ATX Full Tower Case](https://ca.pcpartpicker.com/product/KCsKHx/rosewill-case-rise) | $99.99 @ Newegg Canada
**Power Supply** | [Corsair - RMx 650W 80+ Gold Certified Fully-Modular ATX Power Supply](https://ca.pcpartpicker.com/product/Rp8H99/corsair-power-supply-cp9020091na) | $134.99 @ Newegg Canada
**Monitor** | [Acer - GN246HL 24.0" 1920x1080 144Hz Monitor](https://ca.pcpartpicker.com/product/PmyFf7/acer-monitor-umfg6aab01) | $264.73 @ Amazon Canada
| *Prices include shipping, taxes, rebates, and discounts* |
| Total (before mail-in rebates) | $2200.92
| Mail-in rebates | -$40.00
| **Total** | **$2160.92**
| Generated by [PCPartPicker](https://pcpartpicker.com) 2018-07-05 23:51 EDT-0400 |
I upgraded you to 8700K, 3200 DDR and added a SSD. The GPU is higher clocked and it is only $29 more.
 

As was previously mentioned, while an i7-8700/8700K might potentially cost a bit more, an i5-8600K should cost less than an i7-7700K and will offer very similar performance. The 8600K might lack hyperthreading, but it has two more physical cores, giving both processors comparable performance in multithreaded scenarios.

As for the 8700/8700K, they not only have six cores like the 8600K, but also have hyperthreading. As far as that affects performance in today's games though, it doesn't really make much of a difference. Most of today's games are still optimized to run well on quad-cores, and it will likely be some time before having more than six physical cores will show much of an advantage in games, unless perhaps you are doing something like live-streaming. The current i7's might potentially offer better performance in some games launching a couple years down the line though. And they are clocked a bit higher at stock clocks, but that wouldn't really matter much if you intend to overclock.