I have an '03 and I really like it, I just don't get to ride it much. They have some quirks like any other quad but they are pretty minor. There is quite a bit of torque on tap. The suspension is possibly the best I've ridden on a stock quad to date. The '03 has a longer swingarm than most Preds, so the front end stays well planted, you'll just need a tire with better forward traction, IE Razr II's over Razr I's, and I reccomend a 22" front tire for a bit more weight shift.
I rode an '05 TLD Pred and honestly prefered my '03, the only benefit to the '05 was reverse.
If I could, I'd take my YFZ back in a heartbeat but I had five times as much into that quad as I do my Predator.