I had a Rockwood for 11 years. Had a couple of issues with it but in general a very good trailer. As Ralph Cramden stated look over the one you are interested in very good and don't worry about the others.
We missed a couple of things on our new Grand Design at the PDI/didn't document them well and now getting push back from the dealer. Some things just happened on maiden voyage and have been taken care of.
Go over everything and take pictures, document, document and document again. We found a big chip in the burner cover that was covered by the grates when cleaning it last day of maiden voyage. Dealer didn't come right out and say we did it because it wasn't documented but hinted very strongly at it. Just like the fine scratches in the counter that they agreed to buff out but didn't. Guess he should have come to my house and looked at our 26 year old kitchen counter that only has a couple of scratches.
Done with my rant now. Rockwood's are a solid trailer and can't go wrong with one in IMHO. Just didn't find a floorplan/decor that we liked as much as the Grand Design unit.