My 3.1 cents
This is what I do as a day job and I like all 3 consoles. They are all gonna make me rich
PS2 has the largest game library now and is a lot of fun. By the way no one mentioned the problems with PS2 burn out. I would get a warranty with yours if you chose it.
GameCube is doing ok in Japan but not as good as PS2. The main thing is the availability of games for the consoles. Game Cube has the least now but their titles wil get better.
X-box is going to do well no matter what people think of microsoft. Hands down it is the most powerfull gaming machine in existence. Games are going to be great.
Think about this for a bit too. The first few months of games for both GC and Z-box will be lackluster. Give them about 6 months and we will all be blown away with what games look like.
One reason why X-box will do well is that the gaming software companies have more experience writing for the X-box hardware. It is easier and less expensive to produce for x-box too.
Also Microsoft is throwing half a billion into advertising.
Spankstrocko