Xbox make you pay for EVERYTHING multiplayer new maps, changing your name. Heck probably a charge too change cd's
PS3's have an inefficient gfx loading system eats up ram causes lag. and they have lotsa glitches.
Well, you don't need to download DLC, choose a good name, and then its just 60 dollars a year for the best multiplayer experience on consoles.
All PS3 games except for Uncharted 2 have used about 50% of the PS3's possible power. The Xbox is almost at its limits, so very soon the PS3 will surpass the other consoles in graphics and smoothness of gameplay. The online isnt too great, but its free.
I will say PC gaming is probably the best, but the most expensive.