Another option that a full timer pointed out to us when we were asking about 5th wheels was that the chassis is much more important if you are doing much traveling. It convinced us to look at our Arctic Fox, which is heavy for its size, but is built to handle on and off road conditions. Most of the manufacturers that build toy haulers have much stiffer, heavier chassis. One that we are considering for our next rig is Weekend Warrior. They boast a LIFETIME warranty on the structure. Definitely worth looking into IMHO.
We are VERY happy with our Arctic Fox. Our previous unit was a Gulfstream SeaHawk, and the Artic Fox is hands down a MUCH better design/built unit. Northwoods (who builds the Arctic Fox) is great to work with. We had a minor issue with our unit that the local dealer thought was major (they thought some of the roof nails were coming up), and so Northwoods had the unit picked up, took it back to the factory, took the entire roof off, only to find out that the EDMP roof liner had some air bubbles that caused the glue to bunch up. They put the unit back on the assembly line, put an entire NEW roof and liner back on(yes, new vents, skylights, ductwork, fan, etc. ), fixed any other little issue they could find, went back through QC with it, and had it brought back to us. We would definely go back and buy another one without any hesitation, the customer service is excellent.
Keep in mind about size that ground clearance could be an issue with some rigs, if the overhang is too much. ALFA advertises that they have a really great frame design that allows for more basement storage and if you stay in "conventional" campgrounds and mobilize that is fine, but the ALFA (used) that we looked at had serious wear marks on the skid bars at the back and the jack plates at the front, from dragging.
You can never have too much storage space, is what we are learning. Our next unit will be larger and have more storage space, maybe even a toy hauler (use the "garage" for storage).
Thats my 2 cents worth.
Jeff