herrwizo :
Adding an i5 and SSD will make things even better, so go for it. If you can, get i5 6500, it is only slightly more expensive than i5 6400, but has considerably higher clock speed.
As for the cheap $350 rig... this is somewhat doable, but only if you don't need monitor, mouse, keyboard and operating system. Otherwise, it can hardly be done. I will assemble one like that for you in a few mins.
is it a killer now
[PCPartPicker part list](https://pcpartpicker.com/list/VG7zXH) / [Price breakdown by merchant](https://pcpartpicker.com/list/VG7zXH/by_merchant/)
Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i5-6500 3.2GHz Quad-Core Processor](https://pcpartpicker.com/product/xwhj4D/intel-cpu-bx80662i56500) | $189.99 @ SuperBiiz
**CPU Cooler** | [Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler](https://pcpartpicker.com/product/hmtCmG/cooler-master-cpu-cooler-rr212e20pkr2) | $26.88 @ OutletPC
**Motherboard** | [\*MSI H110M Gaming Micro ATX LGA1151 Motherboard](https://pcpartpicker.com/product/rLs8TW/msi-motherboard-h110mgaming) | $69.99 @ B&H
**Memory** | [G.Skill Ripjaws V Series 8GB (2 x 4GB) DDR4-2133 Memory](https://pcpartpicker.com/product/R6RFf7/gskill-memory-f42133c15d8gvr) | $54.88 @ OutletPC
**Storage** | [Kingston SSDNow V300 Series 60GB 2.5" Solid State Drive](https://pcpartpicker.com/product/kzQypg/kingston-internal-hard-drive-sv300s37a60g) | $42.99 @ Jet
**Storage** | [Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive](https://pcpartpicker.com/product/MwW9TW/western-digital-internal-hard-drive-wd10ezex) | $49.78 @ OutletPC
**Video Card** | [Gigabyte GeForce GTX 1050 Ti 4GB G1 Gaming Video Card](https://pcpartpicker.com/product/yprcCJ/gigabyte-geforce-gtx-1050-ti-4gb-g1-gaming-video-card-gv-n105tg1-gaming-4gd) | $168.99 @ SuperBiiz
**Case** | [Corsair SPEC-02 ATX Mid Tower Case](https://pcpartpicker.com/product/FtV48d/corsair-case-cc9011051ww) | $59.99 @ B&H
**Power Supply** | [SeaSonic G 550W 80+ Gold Certified Semi-Modular ATX Power Supply](https://pcpartpicker.com/product/DPCwrH/seasonic-power-supply-ssr550rm) | $59.99 @ Newegg
| *Prices include shipping, taxes, rebates, and discounts* |
| Total (before mail-in rebates) | $733.48
| Mail-in rebates | -$10.00
| **Total** | **$723.48**
| \*Lowest price parts chosen from parametric criteria |
| Generated by [PCPartPicker](http://pcpartpicker.com) 2016-12-23 10:41 EST-0500 |