Stay away from the 2002-2003 models, unless you like to replace coilpacks, etc..
2004,2005 1.8T models come with a 6spd gearbox, and uses newer coilpacks. If the car has over 100,000kms, make sure you change the timing belt and the waterpump on it (It's not that expensive if you do it at a reputable VW shop :
JS, JMP)
If you're thinking of importing one from the states, try to look for an 'ultrasport' model. It has sport seats, black headliner, sport suspension, s4 skirts, 18" wheels, and a subtle, yet very sexy aero kit moulded into the bumper..