I have one of the all stainless 48" from cabelas, I like it, it does great poultry, and is big enough to hold a crapload of sausage and the 24" beef sticks. Have done turkeys in mine and it will hold a lot of cornish hens. Never did any ribs or butts in mine, those usually go in my cookshack.
They are not insulated at least mine isn't, and if you are in a temps are not easy to keep steady, have not done the needle valve thing but I believe I will. When I was using mine a lot I had it under roof and sheltered from the wind, it was always windy where I used to live, I moved about 3 years ago and now have no place to get it set up, but I am working on that,
If you found a good deal or one you can live with go for it and then do a search on here for needle valve, and I think you will be happy. Depending on where you live and the temps and wind in your area.