Thanks to the crappy build quality of Xbox 360, I am now a PS3 owner. So far I've only played Killzone 2 and Little Big Planet, but so far so good. The fact that it's nigh on silent when switched on is a welcome relief from the fail-box
You've chosen 2 fantastic games to start with. I've got both systems myself, and my 360 is still working, but ever since I got a hold of LittleBIGPlanet, my 360 now goes completely un-used. I'd trade the 360 in at my local EB if they'd give me anything more than $50 for it. O_o -- Hmm..
Personally, I'm quite satisfied with my switch from 360, to PS3. Thanks to LittleBIGPlanet alone, I now have a PSN friends list that topping around 45 people of whom I quite regularly play with. (I think I had 5 total on XBLive, and those I rarely played with.)