The R9 390 I'm looking at on newegg is about 270$, I'm upgrading from a 1 GB ATI 6870 (I never realized how horrible it is to run with only 1 gb of vram). The GTX 970 I'm looking at is a refurbished Gigabyte GTX 970 on neweggs too, at 290$ which is barely below the 300$ limit I have. I'm also worried about either GPU working with my OCZ 700w PSU, which I haven't heard quite stellar things about.