Disclaimer: I own a Winnebago.
While Winnebago is one of the better quality rigs, most of the added value over the other premium rigs is the name. If/When you decide to sell it, the name will bring a premium. It is, however, far better than the entry level rigs.
Don't get me wrong, my Winnebago is a wonderful rig. I have never regretted a single time choosing Winnebago. Winnebago is the only company I know that puts the schematics online for you to download so you can work on it intelligently. Winnebago has a product catalog that lists everything you may possibly want to add or replace, but doesn't sell directly to the public. However, Lichtsinn Motors is an RV dealer within a mile of the Winnebago factory and is happy to sell to you. I have bought from them many times. If they don't have it in stock, they drive down the street to get it.
So, if you are into working on your own rig, the schematics, catalog and Lichtsinn Motors make that a breeze. When you go to sell it, you will recover at least a part of the premium you are paying. And, you will have a fine MH.
Bobbo