Welcome to the club!
I would stay away from the Darkness I didn't think it was that great controls sucked. Get Resistance if you want a great FPS, I love it and I always play online!
Also get Ratchet and Clank Future, I just got this last week and can't stop playing it. Also highly suggest Uncharted, Assassin's Creed, and Heavenly Sword.
You can go to the Playstation Network Store and download demos to Uncharted, Ratchet, Resistance, Heavenly Sword, as well as many others which I highly suggest you do before buying!
You can PM me with any other questions you might have.