Coming from someone who has both consoles and doesn’t care a bit about the so-called ‘wars’ or ‘fan boy fights’, I would say that your decision, like others have also said, should be based on the games.
If it were down to the console itself, I’d say PS3 without a doubt, here are some of my reasons:
I find the Blade system on the 360 a little too slow and not at all as fluid as the Cross Media Bar on the PS3 – having said that, you can actually access the Blades in-game on 360; XMB is supposed to be like this soon though.
Live, although not expensive, seems a bit of a waste of money I find the Marketplace is also overpriced (imo), whereas Playstation Network is free, yet lacking in content at the moment.
The games – these look almost identical on both systems, with the exception of Call of Duty 4 (yes I have it on both), I find it looks sharper on the PS3, with less HDR blurring; Vacant for example, looks ace on PS3 but noticeably odd looking on 360.
BluRay – whilst not a necessity, and I don’t notice enough difference from DVD to warrant paying an extra £15 on a movie, is nice to have in the event games start getting bigger than DVD9 (the 360’s format I understand?).
Controllers – I find the PS3 controller, although small and light, is still far more fluid for FPS gaming. I don’t really understand why people hate it so much, none of its faults have affected me enough to write it off. The Dual Shock 3 is also a nice addition.
The most important bit, for me, the hardware of the PS3 just inspires more confidence, it is quiet and has a pretty small footprint, unlike the 360 which is like a hoover, with a built-in heater, and has that power brick to also lug about. The failure rate of 360s is also very off putting, and getting CD problems with your machine after not even a year of ownership isn’t on.
At the end of the day, I still enjoy playing both, but PS3 gets the most of my time.
Anyway, there’s a few of my own opinions on both systems, probably get picked apart by owners of 360, but it’s a forum so everyone has their right to express views right or wrong
Scort.