I would class some of those components as pretty low end mainstream. Therefore downgrade the case to an Antec 300, more fitting with that build and upgrade to 2x2GB of RAM. This is assuming the case isn't part of some kind of bundle deal ofcourse and you're saving some money. Also do some price cehcks of the Gigabyte GFX card to some 5770s. If the difference is miniscule then by all means go for the 5770. which is noticeably better.