I've got a top end PC and every console from the ps1, dreamcast and Atari VCR.
But mainly I play on the Xbox.
Once money isn't an issue, it's all down to personal taste. If perfect Dark zero is a patch on the original, I can't see me playing much of anything else.
But, main thing for me is that gaming is a social activity, we play multiplayer while we talk and drink, you can't do that online. PC game might be faster, more detailed etc... but I challenge anyone to play halo with a mouse and keyboard while drinking tequila every time you get killed, in a room with seven of your mates doing the same.
Console vs pc is void argument, they are too different.