It realy depends on what you like to do.If you like doing technical things,making movies(and going to Armor Games alot) then computer is the one for you.On the other hand,if you are a heavy gamer(which goes for both P.C. and Ps3),and like to sit on a couch instead of a chair,go Ps3.
I personaly think that both are powerful machines,but i enjoy P.C. more even though i have a Ps3.