i have mine as of now...2003 pro x 700 144'. I like the graphics of the 2004 model a bit better but since the first day i saw the pro-x's ive wanted one. I think they look great and they are a proven, excellent trailing arm chassis, perhaps the best ever (from polaris atleast). Ive also been particularly fond of the 700's since i think they give the best power/reliability combo (600s as well). Ive also wanted a long track sled for the obvious reasons and because i like the way they look too.
2003 pro-x 700;
TracksUSA 144" tip-up rail extensions
1.25 camoplast predator /120 1.40' extreme max SS studs
VanAmburg tunnel extension
SLP Powder-Pro skis, Powder-Coated suspension
tempaflow-420 main jets
10-64 weights w/ round almond spring
24/42 gearing, gutted airbox, PERC, torque arm