We had a 2006-2551PC and just bought a 2012-2552.
The 2552 has much more storage space.
They tell me they went to 2-6v Trojan batteries as standard. But if not, it is a no charge option.
Cabinets- We like light colored cabinets. Make thinks much brighter inside.
1-A/C is plenty. Where we travel we are lucky to find 15amp service. Can't see why you would want 50 amps, for a few minutes of microwaving while air is on.
Rear ladder is a must for us, we carry our boats on top and rear hitch is best place for bikes, There is not much outside storage to would hate to loose cabinet to folding bikes.
Take a look at the pictures of our rig I posted on our blog. My Mexico Blog
, we are the ones who moved the antenna to the rear.
By the way they put a fan in the rear of the refrigerator in the slideout, really required with no top vent.
Rig color, we travel in hot weather and prefer all white outside.
Unless you plan to drive you rig over 200K miles, you really can't ever justify having a diesel to save money. We drive a lot but probably only average 10K per year. Long trips is why I prefer power seats and we like all cloth everywhere. It is a very good quality material in the newer units.