Mike, we just picked up our 2006 FR Sunseeker 2860DS on Saturday. We went right to the camground from the dealer, and so far we love it. So far we like the quality of the unit. We opened every door, draws, and windows, and haven't found anything wrong yet. We had the A/C (it has the 15.0 btu unit) on the whole time we were there, and it ran great. The only thing we didn't try is the furnace, just because it was so darn hot out. The generater (4.0 Onan) was running from the time we got to the dealers until I shut it off at the campground, and again we had no problems with it.
Ours has the E450SD Ford chassis under it, and it ran great.
We traded in a FR Wildcat 27RL 5th wheel, that we bought new in 2003. That's one of the reasons we went with FR again. We were very happy with the quality of the Wildcat, but we didn't have the truck to tow it anymore.