Upgrading - unsure about Motherboard, Ram and PSU.

[Aftershock416]

After posting about it a while ago and doing some research, I made the choice to upgrade my system.

The current build:
- Intel i5 4670K CPU
- GALAX GTX 1080 EXOC
- 16GB DDR3 1600 Mhz RAM
- Gigabyte P85-D3 motherboard
- Coolermaster Masterliquid 120 Pro CPU Cooler
- Antec NeoECO 650W Modular PSU
- 2 SSD's and a HDD.
- Standard ATX case with 5x120mm fans.

Now, as I'm upgrading to the Intel i7 7700K I would of course need a Z270 series motherboard. Bear in mind that I live in South Africa so everything isn't readily available, but after some research I've narrowed it to a few contenders which cost more or less the same :

- ASUS Prime Z270-P
- MSI Tomahawk Z270
- Gigabyte Z270M-DH3

As far as I can tell, most of the difference are mostly cosmetic or largely irrelevant. Are there any captains with some wisdom to share in regards to this? Or even any other recommendations you would make? There are several more boards available for 25-30% of the price extra, but if I look at the features they don't sound like anything I want.

The second part of my question is about the RAM. Is it worth it paying a tiny bit extra for 3000MHz RAM over 2400MHz (or even 2800Mhz which costs the same)? None of the motherboards I listed supports it natively, so I would need to 'overlock' the RAM to run at it's stock speed, if I understand that correctly? Also, I assume it's better to run 3000MHz rated RAM at 3000MHz, than it is pushing a 2400 or 2800 set that far?

And finally, will the Antec NeoECO 650W be able to run an overclocked 7700K and a GTX 1080 along with everything I listed?

Your advice will be very much appreciated!

 

[tubagznyven]

well your choice already good enuff and about the RAM if u dont want to OC it its better u buy the 3000MHz,so u dont need to OC it,your PSU already good

 

[Aftershock416]

well your choice already good enuff and about the RAM if u dont want to OC it its better u buy the 3000MHz,so u dont need to OC it,your PSU already good

Honestly, that does't help me much. Merely saying that my choice in motherboard is 'good enuff' does not really help me pick between the 3, unless you mean they're all identical enough that it doesn't matter.

In regards to OC: Yes, I do want to overlcock the CPU, but not necessarily the RAM. I meant that since none of the boards I listed supports 3000Mhz RAM natively, I'm not entirely sure how that translates to overclocking a set to actually get the rated speed.