I guess as a smart-A I'd say.......I got a queen bed that I use. As far as Duke goes.......he has a rectangular one designed to fit in his cage. But he
always seemed like a locked up con inside the cage......so we opted to just put it in the corner of the room minus the cage.We only use the cage in the van, if we are traveling a large distance. If he's wet when finishing his yard muffin making he knows he can rest on that. Otherwise.......he sleeps on one of three sofas in the house or he climbs the steps I made for him and hogs all of the queen bed by lying right in the middle. The sofa choice depends on which room I'm in....since he is my constant shadow.
It sounds like you got a chewing problem. I'd reccomend buying several hard rubber toys and leaving them near his bed to chew on.