For $22 more, this is a lot better. More cpu power, better chipset, more reliable ssd, and a psu better suited for your needs. I wouldn't put a 350w with a R9 270.
PCPartPicker part list:
http://pcpartpicker.com/p/3KT92
Price breakdown by merchant: http://pcpartpicker.com/p/3KT92/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3KT92/benchmarks/
CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($196.98 @ Amazon)
Motherboard: Gigabyte GA-B85N Mini ITX LGA1150 Motherboard ($75.24 @ Amazon)
Memory: Patriot Viper 3 8GB (1 x 8GB) DDR3-1600 Memory
Storage: Crucial M500 240GB 2.5" Solid State Disk ($119.99 @ Amazon)
Video Card: XFX Radeon R9 270 2GB Double Dissipation Video Card ($188.98 @ Amazon)
Case: Silverstone RVZ01B Mini ITX Desktop Case ($84.99 @ Amazon)
Power Supply: Silverstone 450W 80+ Bronze Certified SFX Power Supply ($70.16 @ Amazon)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit)
Total: $736.34
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-15 23:24 EDT-0400)