everyone I know is on it,
.
this is what ultimately will make people decide. Both consoles offer the same experience but if all your "mates" are on one then no point really in having the other.
In your case though if you don't want multiplayer (paid service) then i'd stick with the PS3.
why? the ps3 is more reliable and imo has the betetr exclsuive games. its more than just an iplayer
best platform for gaming IMHO