Well , for me , under 45/50 fps it's not really playable it's almost impossible to enjoy the game , unless it's the most demanding game ever i can accept to run at 30 fps etc.
and i know about the x6 but i think i wouldn't feel right in my mind if i don't buy it , i'm planning to keep this pc at least 5 years , so maybe some games will need 6 cores soon , and even if it's not , i'd prefer to have it.
ty