We bought new from dealer stock being shown at a local RV show. It was the same dealer we had purchased a TT from, so we were familiar with them. It had everything we thought we might want and had the dealer add a few other things (slide toppers, central vac, washer/dryer). Since getting it, I've added the Ground Control jack system, Ultra-Fab stabilizers, a surge suppressor, MaxxAir vent covers, and a 5th Airborne pinbox.
If you buy direct from the factory, you may run into hassles getting warranty work done locally unless you check out available dealers. Some have a royal bug up their tailpipes about not doing warranty work if you didn't grease their palms with the purchase. Others are more customer and business oriented.