It depends on terms of looks over playability. Some guys say the X-Box is best...some say the PS2 is best, and others say the GCN is the best.
In all fairness to either of the three consoles...PS2 wins the "war" hands down...it's got far better games that any other system to date. Next in line behind that is the GCN, cause it's Nintendo...and thry can make great games. Third in line is the X-Box...and the only reason it is last in sales in America (and it will flop hard in Japan) is because it does not have any killer apps on it. Halo is said to be the best game of all time, but I'll be able to save $200 when I get it for PC later in the year.
I'd go with the PS2...as it has a wider selection of games (GTA3, Gran Turismo 3, Frequency, Metal Gear Solid 2). If you want to save money slighty, go with the GCN...as it has some killer games (Eternal Darkness, Rouge Squadron 2, Resident Evil)
You make the call...IMO the X-Box only has good LOOKING games...not good PLAYING games.