I just got a 2003 Jetta TDI about 3-4 months ago and so far I LOVE it! I did a lot of lurking around here
http://forums.tdiclub.com/ before I made my final decision. This is the first time I've ever WANTED to go to the fueling station because it takes so long to go through a tank and I'm excited to see the mileage I've been getting. If you end up going for a Jetta TDI, make sure you don't get an automatic(01M); they're notorious for problems. Hope this helps!