On the insulated side there are a lot of good choices. Since you are in Iowa take a look at the Spicewine smokers
built in Columbia, MO. You can drive down there and pick it up when it is ready and save a lot on shipping.
Backwoods also makes some very good insulated smokers and there are a few Backwoods dealers who are members here. Check out the Brethren Ventures section for them.
There are lots of others, Stumps, Superior, Assassin and others.
There is an Assassin for sale by a member in NC in our General For Sale section...
There is also a member selling a beautiful home built Stumps clone, but it is in California...