Check out Cook Shack. I have had one for better than 12 years and NEVER lets me down. I use it for pulled pork, ribs, brisket, chicken, turkey, and best of all…making sausage and venison snack sticks.
They are a little pricy but you asked for “good” ones. I use real hard wood with mine. The chips sit in a steel container just over the heating element. I do find that when doing sausage, you need to leave the door open a little to vent as the sausage tends to sweat some when loaded heavy. Gotta keep those casings a little dry to get a good cure.
I have a little one right now but a large one is in my future (just as soon as this new boat stops costing me a grand here and a grand there…lol)
http://www.cookshack.com/store/Smokers_2