Ok, from a pure online gamer my favorite console for online is the Xbox 360. It is p2p, however the online system is stable and much more advanced than the ps3. If you are a competitive gamer, the 360 is also the better option as the general skill level is much higher than that of ps3 players (sorry guys, i owned both consoles and played each one exclusively for 1 year online.)

Xbox 360 has the more gritty game list out of the 3 options (wii), whilst ps3 is more family/friend based. Ps3's free network is a bonus, however stability is pathetic (the servers were hacked not too long ago and took the whole network down for almost a month).

Any questions in particular? Oh, the ps3 controller is better.