With this being my very first gaming GPU (I was only running my 2600k and stuff lol, i was lame), I chose a XFX Radeon HD 7850 2GB OC only to find out that the R9 270X came out a couple weeks later -_-, but I love my 7850 and it’s holding up great. 
My next card will probably be from NVIDIA so I can get a taste of both cakes. I have no problem maxing out games. I can play Battlefield 4 maxed in 1080p with no AA with 60+ FPS on certain maps and 50 - 60 in DirectX 11 on others. I haven’t started using Mantle again becuase I was noticing a couple weird artifacts but that was a couple months ago. Hopefully, it’s enough to run (if not out) Dead Rising 3, Dying Light, Metal Gear Solid 5, and at least get a playable framerate if not 60 FPS in The Witcher 3 on some tweaked settings