Shopping for a GPU (or two) right now, can't decide on what would be best. I know whatever I get will likely run most games just fine (not max, but high), but I want to be able to play modded Skyrim in 1440p. I've been considering between GTX 760 4GB in SLI or GTX 770 4GB. Wondering if either of these options would work and whether I really need to go for the 4Gb cards.