ps3/pc combo is perfect as you have access to most x360 exclusives with your pc, multiplats that you'd rather play on console or with ps3-owning friends (if applicable), and obviously ps3/psn exclusives. If people here try to say that all good ps3 games are shared with pc, or that the ps3 has no worthwhile exclusives, they have no idea what they're talking about and probably think it's still 2007.
Others may choose a wii/pc for a broader range of games (wii and pc have little overlap), nintendo made games, and for local multiplayer. The Wii has a lot to offer, and may be a nice change of pace from PC games.
x360/pc combo is largely redundant, considering you already have access to better versions of a lot of x360 games.
It pretty much comes down to which exclusives interest you the most. I'd suggest a PS3 or Wii depending on your tastes. Someone else mentioned handhelds which doesn't sound like a bad idea either if that's up your alley.
Demon's Souls Official Thread | Currently playing: Left 4 Dead 2, LittleBigPlanet 2, Magicka
