I bought my 2006 2544 in June of '06. Based on your location, I'm pretty sure we bought from the same dealer, who has been absolutely great to me. Anyway, back to the tractor...
The hood was replaced about 6 months after I bought the tractor, as a precaution. It hadn't broken or melted, but the dealer felt it was going to soon. It was in for it's 25 hours service anyway, so he went ahead and did it (at no cost, of course). I also had him replace the tranny fluid and filter, even though the manual doesn't say to replace the fluid. I did this because I didn't like the idea of relying entirely on the filter to collect break-in material. Other than that, I've just done the regular maintenance.
I've also had two headlight bulbs burn out. I've since replaced the headlight bulbs with LED's from eBay, installed taillights, and installed a switch that controls the headlights and the taillights.
I think you're going to like it a lot. I've been amazed at what I can do with it so far. And the ags I put on the rear make it unstoppable (seemingly). I've attached a photo of my tractor after the last big snowfall we had.