Which 5th wheel to buy?

I am looking at a new 5th wheel. I will be using it in cold weather. Any suggestions as to what makes in the 34/38 range are best for insulation. Will be towing with an F350 diesel. Would like something that will last a while. I don't plan to buy another one.
Which 5th wheel to buy?


I just purchased a Doubletree 2007 Select Suites. Will get it in another week or so. The insulation and construction are the best I've seen in a $60's price range 5th wheel. It's one of the few that doesn't cancel the warranty if you full time in it. You might check it out.