While performance is similar, most seem to frown on 200 series because of lack of DX11 support. Honestly, DX11 is overrated. I only use it because I have it, but you have to really look for the differences as they are only subtle eye candy differences. It's like the difference in 4x AA and 16x AA, very little to no noticeable difference.
There was a much larger gap in DX9 to DX10 than there is 10 to 11.