"if you want compatibility and performance on games using wine, your only option for this moment is NVIDIA"
I use a AMD 7850 for one year and I can confirm that point! Even if AMD has improved a lot their Linux drivers, this is not enough.
I regurlarly report game test results to WineHQ and I coudl see Nvidia users have less compatibility/crash problem than AMD users wen running wine games.
Recently Steam Os beta needs a nvidia card... If you are a gamer on Linux, Nvidia is the card to have, for the moment.