If you are thinking about a Frabill, I have a Predator for sale with side entry doors that is like new. Includes tow hitch, cover, and plastic hyfax kit. This is an insulated shell cover....weighs 110 pounds. PM me is your interested.
Otters are nice no doubt, but the Frabill Side entry doors are the ticket, ESPECIALLY when going to one of the smaller 2 man units. Being able to put the heater and holes where they belong and not have to trip over anything going in and out is the winner for me.