Are you sure you have enough truck for that Avalon? Hope you've been using a WD hitch and sway control!
Sounds like you are ready for that 5'ver. I have a Columbus on order and can't wait till it get's here. I think their floor plans are innovative and the units give you alot of features for the money. If you are going to full-time, then floor plan is everything, so choose wisely. Quality seems to be all over the place on all brands of RV's these days, so best advice is to carefully weigh floorplan, features and specs to see what works for you.