Someone questioned Super Stardust HD earlier. One of the first PSN games i bought, pretty kickass. Can only really enjoy it with a really large tv, 32" for example feels way too cramped. It is very pretty and the coop is cool, tho it gets a little annoying ala old school side scroller coop. Anyway, it's certainly recommendable. I already have Wipeout HD and LBP as well, so infamous and dead nation for me. All these 5 games are apparently really good so you can't go wrong with whatever you pick.