Apologies, but the PS3 is obviously better! Yes, the PS3 is obviously more expensive, but it is so worth the extra money. Let's quickly compare the graphics:
Final Fantasy XIII
Lost Something? Shooter game/whatever.
A racing game! XD
As you can see there is a difference in graphics. The XBox has some blurry/ultra shadow thing going on, while the PS3 is much more crisp and sexy. Then, there is so much other crap to consider. Like, the PS3 doesn't charge for online gaming, the Xbox does. I mean, the XBox is an investment and will cost you more in the long run. Another point is the PS3's connectivity with the PSP. Why, just the other day I was downloading some really old and amazing playstation games (FFVII & FFVIII). I mean, the XBox just doesn't have the same legacy. There's a wider variety of games on the PS3, while the XBox is famous for it's first hand shooters. Then the PS3 can also play blue ray dvds. The XBox? Not so much. They're still living it up with dvds. Also, the XBox seems to have more than it's fair share of problems. If it's no crashing and dying, then the network is offline for updates. I can't speak for other people, but my PS3 has never crashed and there's never been a problem with the network. Furthermore, most importantly, the PS3 has a freshness about it. There's more to be explored. It's full capabilities haven't been realised. Xbox, on the other hand, is a bit of a dead horse IMO (the correct opinion *cough*).
To conclude, Microsoft are evil. Sony, not so much. Go PS3! RAH-RAH!