If you want to rely on performance only, the one with a bigger memory will do.
Why? Well, they're all the same GPU, so the thing that will make a difference is the cooling and memory available.
Based on all those options, MSI R5770 Hawk Radeon since they all have 1gb. The MSI cooler will handle a better overclock than the others (I may be wrong, but all the others are have a single fan and almost stock look).
A factory OC shouldn't be a consideration. You can OC yourself easily and to better effect. Of those cards I believe the Hawk and the CuCore cards allow you to bump up the voltage for better overclocking so they will likely give you the best performance.
Newegg just doesn't carry it. Anyway go for the Hawk or CuCore like I said if you plan on overclocking. If not just go for the cheapest by a respected brand. I believe that's usually the HIS card on newegg.