PS4 at launch (first launch day system and getting a warranty for sure). WiiU when it's $200 and has Mario Kart, SSB, 3D Mario, New Zelda (the Gamepad will be great for Zelda puzzles I think), and a Donkey Kong, Star Fox, or good Metroid (could skip on those if it has the others). Maybe I'll go $250 if it has those as no one does local MP better than Nintendo.
PS4 just because I love most of their first party studios and am already stoked for a new Infamous and Killzone as well as Knack. Not to mention ND should have a game pretty early since it's been 2 years since Uncharted 3 when PS4 launches (could take longer with new hardware) and MM has had over 2 years already since LBP2. Also the network stuff looks awesome and I'm ready to share my most unique and awesome bits from GTA police chases to miracle sports wins to funny glitches on Facebook (I have a number of gamer friends). Also they'll of course be getting all the 3rd party support and PS+ should cover all the new features as well as get you those awesome deals for $50 a year. It's gonna be a great generation and I'll be there from the start this time.