I'm late here. Otherwise I would love to sell you my Xbox 360 in great shape with a Kinect and some games... It's a slim 4GB model but I formatted an 250GB aftermarket hard drive and both the HD carrier from Deal Extreme. Sooo, you get the sweet Matte Black slim with the hard drive. Plus some seriously cutting edge games like LEGO something or other, Fable II, Mass Effect 1, and The Darkness!
But seriously, I have both, and I couldn't justify paying the $$ for Xbox live just to watch freaking Netflix. I know PS+ will cost with the new generation, but when you stand in the store saying "Should I get this on Xbox just to justify keeping it?" something's not right. All my local buds have PS3 as well. Plus it's a BluRay player, which you know, is just the bee's knees.
Have fun with it. But if you DO decide on the Xbox 360, let me know