@eblu im using a 6700xt and im happy with it for 2560x1080p gaming but im thinking of getting a new monitor and i would probably need upscaling + framegen to get to my desire spec (3440x1440 @ ~100hz) so it really depends on what you want
@eblu if its purely a display adapter then probably something polaris based is real cheap (400/500 series) but performance or support might not be as good as RDNA stuff i know that @kopper has had issues with specifically ROCm among other things(?)