Same here. The E450 with the independent I beam gives a great ride...
2016 VEGAS here, was our first RV and read all the "horror" stories about THOR but went ahead and made the purchase.. THOR quality has been "ok", and we now have at least ten dozen screws we have found around the MH.
Yes, there have been some small issues, however THOR customer support has been great. Our dealers follow-up, not so much, but so far, tolerable.
Still love the layout and have learned a lot about the VEGAS since we purchased, (especially with the help of people here on the forum). We feel extremely comfortable and, if I can figure out how to get a spare on board (since we have a rear slide) I think we are prepared for "most" issues...