On wash boarded road, bumpy with camper on back, worse without...
I went through the same thing starting with the Newbie 1500 and worked to the 5500.. I went with the 5500 over the 4500 as I felt it's just a better/stronger model, and was only like $1200 difference..
I like it, it's just a little difficult for me, traveling around to find a dealer that can service it... most can take the 3500 no problem but then there's a line.. and few can service the 5500... not a big problem just be aware of it.. and plan accordingly..
Good luck...'