PS3 is pricey but I believe that it has come down in price recently, I have heard a few bad stories about the xboxes history and am not a fan of micro$oft ( although I have to use that environment as a developer).
I have owned playstations since the first one ( and only recently purchased a psp) and have not had too many problems with them.
I bought a PS3 midyear last year for several reasons:
!. Can play blueray dvd's
1a Can play older games on the PS3 ie ps1,2.
2. I had a voucher for a few hundred dollars that knocked the price down a bit
3. You can install another system like linux ( a big plus for me) on the PS3 ( try that with xbox ).
4. Can record from the PS3 to my pc.
People may say games are better on the xbox than PS3 but it depends on what platform the game was developed for first.
I was told Bayonetta had frame drops on the ps3 ( rubbish I have not had any but maybe I have a super ps3
), but then Darsiders is better on the ps3 than xbox as there is no tearing so I have heard.
It really comes down to your choice, I own pc's and would rather play fps and some rpgs and mmo's on a pc than a console, but other games are better on a console than a pc.
Wii don't get me started on that topic.