2003 Buick Park Avenue Ultra 4dr Sedan (3.8L 6cyl S/C 4A)
This 2003 Park Avenue Ultra is my second Ultra. I also own a 1992 (which has lived up to its 4's and 5's for long-term reliability and quality). This is an exceptional vehicle. Excellent for the buyer (not for the seller - very low resale), which enabled me to purchase the car well under what it's worth in my eyes. I have now owned it for a little over a year and its been fantastic. Mine is fully optioned (I bought it in Hawaii and it has heated seats). There is nothing about this vehicle that I would change (save putting an LS2 into it). It is granite in color, with the chrome accent option and a tastefully done leather interior. The Supercharged 3800 V6 is spectacular.
Alas, this model line is gone. Its newer cousins, the LaCrosse and Lucerne carry on the name. The Lucerne carries the one improvement I would suggest - the V8. I hear this will be available on the Super LaCrosse in 2008 as well (excellent move).