Im still half tempted to go for an MSI or Gigabyte 970 next year and then sell the gainward.. I still have my mind set on a 970 being in my machine over the 390 I just think I could get a better card than the Gainward and then see some good results.
I doubt you'll see much improvement moving from brand to brand, nothing ground breaking anyway. I'm the opposite, I made the move from AMD/ATi to Nvidia in September after 8 years with them and I can't wait to go back. Getting rid of the 970 and moving to an MSI 390 this weekend.

Can't go far wrong with the msi 970 though, lovely card. Gave it to my brother as it was too big for my Corsair 240 case and started to crack the side panel.
