Mainer, you got a great deal. There are lots of those out there, and your research certainly paid off. Don't ask how jealous I am that you have a garage for that baby. I'm now fretting that we are bringing ours back to the lot tomorrow, and I want to use the new Adco cover, yet we have to deal with the snow both on the coach and in the lot.
Birdy, I recommend the 36" width. We traded beds the last nite we were out and tho' comfortable, I do like the extra size. (I'm 6'/190 and my wife is 5'5"/130, so the smaller bed is fine for her) Get a lightweight mattress if that's what you decide and making the extra accommodation for the special bench hinges I got will make access to the compartment much more user friendly. Make sure you get the ones WITH springs...
http://www.hardwaresource.com/Store_ViewProducts.asp?Cat=1253