Whats the best Ati 5770 to get?

so i was looking on newegg for an ATI 5770, but theres so many different companys. which 5770 on newegg is the best? i plan on crossfireing later but keep in mind my PSU will just barely have enough power to crossfire these so i dont want one that takes extra power. also space is an issue so the smaller the better (even if its only by a tenth of an inch or so)