Hi I currently have a Mac Edition of EVGA GTX680. The card is phenomenal. I never had any issues physically so far, and the card is still going very strong with both games and Microsoft Office use. I am trying to upgrade my card to GTX970 and I have a few questions. I don't care about the boot screen because I already have GTX680. 1) Would 970 be much stronger than 680 in terms of performance? Since 680 was still in the 80 family, but GTX980 seemed still expensive so I was wondering. Or would 1060 fit with 2 6-pins and even better than 970? 2) I prefer EVGA model because I have good experience with this brand. Would you recommend me which GTX970 I should go for? (If not EVGA, what else is recommended?) - This has to be both energy efficient as well as be connected with 2 6-pins like my GTX680. Thanks.