In 2010 I switched up from, a 30' Outback fiver to my current 35' Titanium. Same truck, same roads and I gained a little more than a mile per gallon average on long trips even though the Ti is about 2,000 pounds heavier.
We love the Titanium. Glendale called it a 30-E-35. Thirty feet from pin to bumper and thirty-five feet overall. The extra five feet is the part out over the cab of the truck. Ours has a fore and aft queen bed with about 2/3 of the length on the extended nose area. Getting up and down onto the bed takes a little getting used to since is about 32 inches above the BR floor level (there is a step on each side to assist), but the extra room is easy to get used to.
Tows and backs like a thirty footer; lives inside like a thirty-five footer. Rides rock solid behind my 3500.
Glendale, a Canadian company, went bankrupt in the great RV shakeout in early 2010.