I did get the residential refrig, but only after I decided to upgrade to the 24k chassis. I read many stories about a sometime very low CCC with this setup and the stock 22k chassis. The 24k is the same chassis used by the big 36 foot gas Tiffins and I am 150% happy that I did. Not only do I have a CCC over well over 3000 lbs, the handling on the road is fantastic. It drives like my Suburban, no side sway, no bumpy ride and I can virtually carry ANYTHING with that CCC. For only an additional $2500 the upgrade to the 24k chassis is something you should consider. I was at the Tiffin factory when my coach was being built and was able to see side by side comparisons of the 22k stock chassis vs. the 24k upgrade. More suspension, bigger leaf springs,slightly bigger tires, HD brakes and a significantly increased turning radius. Of course she doesn't but it seems like to turns at a 90 degree angle, not sure of the actual turning radius but navagating through a crowded parking lot is no worries at all. Love my 31SA would never buy another brand except for Tiffin. Got my eye on a Phaeton somewhere down the road.
You may also want to join the
www.tiffinrvnetwork.com/ for more information on the 31SA or any other Tiffin models. So in conclusion my humble opinion is...
Order a new 2015 31SA. You should be able to negotiate a price of less than $125k when you order it and not take one off the dealers lot.
Go to Red Bay while it is being built. 4 days max from chassis to paint is all it takes.
Get the 24k upgrade chassis.
You will love it.
Good luck.
Russ in Oregon