http://www.newegg.com/Product/Produc...82E16814161427 (7750 2GB)
vs.
http://www.newegg.com/Product/Produc...82E16814161402 (7770 1GB)
Both fairly cheap cards but both seem to be pretty strong though I don't know if the greater GPU memory will make enough of a difference to put it on par with the 7770.
Wanting to run Skyrim on mostly high settings possibly with FXAA enabled and running ENB's + a few texture packs. I was able to run those things on a crap card so I'm sure these cards can do so too but hopefully this time with FXAA and higher frame rates.
Also PSU recommendations to go along with those cards would be good. Don't want to spend more than $150-$170 total.