We bought a Terra 31M in July. We've been out 3 times and absolutely am happy with the big GM engine and 6 speed allison trans., Went from So Cal up to the sierras, dry camped a few nights, hit an RV park for a few nights, and had no issues at all. Love the popouts, roaming sattelite, marquis gold generator, side hall jack and jill floorplan, etc. Leaving tomorrow morning first time with my 14 ft enclosed trailer behind it. Loaded with fuel, Rhino, Yamaha 125, Honda CRF 450R, firewood, etc etc. We'll see how it goes up Cajon pass. In my old 95 class C, it was 40 mph screaming. I'll be happy with 45 and NOT screaming.
Enjoy what you have. Of course I'd like a top of the line diesel pusher with all the bells and whistles, but that is not an option.