Wait for the new consoles.
But, meanwhile, if you're desperate that you can't wait a couple of months, then here's the good-and-bad list (in my opinion, that is)
Xbox -
Expensive games
Not-so-good online gaming experience
Gets heated up and makes a lot of noise (Mine does, dunno about Slim though)
Hard to find games
Basically, Xbox is good for nothing as compared to PS3
but if you've got a spacious mansion and an extra 200$ to spend Kinect, then XBOX!
PS3-
Expensive games
Good online experience
Better/equally good graphic's
Doesn't get heated up quickly and doesn't make much noise
has Move™, which, i've never tried, but i've heard it sucks
PS3 is great compared to Xbox for REAL BADASS GAMING, but there's no motion control.
I, as a 13 year old, would LOVE motion control, but then again, you're a grown up guy, dancing like a retarded monkey in your living room to play a game or ducking and jumping to avoid obstacles. That might not be something you'd love to do all time, especially as it takes a LOT of physical effort and proper maintenance to maintain the Kinect, you gotta put your balls into it, it drained me in less than 30 minutes, but, it was a good experience.
Move wouldn't be that bad either, and IMO, it'll be better, but, again, no experience with Move.