Multipack :
Budget? Max size card that'll fit in your case?
Best value vs performance of all 1070's is the Zotac AMP! Extreme in my opinion.
How do you figure? That model is slightly over EVGA FTW base clocks (read no difference in actual performance) and has a year less warranty for the same price (well, EVGA has a $20 MIR on the FTW so if you take a few minutes to fill that out, it's cheaper). EVGA also has best in class warranty and support.