Honestly.. if that store can exchange them for 1080 foundation edition cards go for it as the blower style fans are best for sli as it blows the heat out the back of the case insted of in your case.
If wanted it is possable to install the evga hybrid cooler on the fe cards. The hybrid cooler costs like $120? Ea. Same type of cooler as your cpu cooler. Good to buy evga fe 1080s as they don't care if you remove the cooler to water cool. As long as you don't physically damage the cards your warranty is good. With evga.
Most fe cards will run 2050-2100. I know.. I've read all about them and have tested 4 of them.