If price is no object, stick with the PC for everything when comparing it to a console.
PS3 and X360 are generally the same, except:
MS burns money on getting stuff first (+), but their controller feels like a brick (-)
PS3 has a better controller (IMO) (+), but it has a vastly inferior fan base to both other systems, resulting in less [censored] given when something is wrong with it, which is inevitable since it wasn't made for the PS3, it was a port, even more inferior to the PC port.
I'd say go with PC unless you cannot afford ~$1500 worth of materials to build a suitable gaming PC