Mine is a 7x16 tandem axle Cynergy Advanced model, here's a link to is standard features
http://www.cynergycargo.com/our-product.html.
My upgrades were: added 6" in height, extended triple hitch with spare tire mount, spare tire w/matching tire & rim,30x15 window installed, upgraded to 16" roof rafters, added ramp door, upgraded side door to 36" RV style door, wired & braced for roof top AC.
Out the door I paid in the $4500.00 range,delivered. Bought it through a local dealer because they were within $150.00 of those "factory direct" prices and I'd have spent more than that on lost work and gas to go pick it up. I'm only four hours from most every one of the factories in south GA.
Martin