I had a 2001 Jetta 1.8t that I bought new and had for several years. Mine was very reliable and a blast to drive, especially with chip, full exhaust, intake, big intercooler, Bilstein coilovers, sway bars, etc etc. But even stock it was fun. I guess the gas milage was pretty decent, but probably better in the 2.0's.
If you aren't on there already, get on vwvortex.com, that's probably the biggest online community that covers those cars. you should be able to get more info on reliability, milage, etc.
There are a few of them around my neighborhood, and every time I see them it brings back fond memories of mine.
