What are your new PC's specs?
Take a look through my Steam library for some ideas. Not ALL of them are good, though: some are free-to-play and others I took a chance with and bought on sale. Oh, and then there's DNF, which I paid full price for and regret deeply. Also, ignore the "hours on record" stamp, which has never ever shown anything accurate.
http://steamcommunity.com/id/ministerof ... es?tab=all
And my current desktop, with some of my favorite and some recent purchases. Again, not all of them are good (Brink) but they're not all in the Steam library linked above, either.
(click for high-res) EDIT: Photobucket sucks and keeps breaking the high-res link. It's the right link. Try copy-pasting.
Ask about any of them and I'll be happy to tell you more. Some of the more eccentric stuff is the stuff I like the most...Gratuitous Space Battles, Cthulhu Saves the World, Spacechem, Capsized, etc.