PC and Cube.
First off for the guy that said PC's die out quicker? Actually it'd be about the same as any other gaming machine. You don't upgrade yearly, but every coupla years..... which is at about the same rate as a lot of consols. Maybe a bit sooner than consols, but thats easily offset by the sheer number of games it has.
PC is definately a gaming console... if thats why you made it. Sure I can do word processing and other college crap on here as well as check my email, but I made this computer to do one thing well... Play Games. It does its purpose for I've spent countless hours on this machine making every penny spent on it the greatest pennies to ever have existed.
Cube? I'm a nintendo FanBoy and they have games that others just can't compete.. Metroid, Zelda, SmashBrothers...
Gimmie about Six months and I'll at DS to the list (No reason to buy it immediately I still have a game to beat on my SP)
-edit-addin-in---
I almost forgot!! Some people say the computer games don't live up to their potential? Games like CS or Desert Combat would have never existed had Half Life or BF1942 never existed. I believe computer games don't just live up to their potential but take it further and live so much beyond the game that .. well.. that new games sprout from them. There are a lot of great games for consoles, but no one is able to mod them into new ones.