There are lots of units to use as smokers go. Questions to ask yourself.
How often are you going to use the unit?
How much food are you going to cook?
Does size matter?
How much money do you plan to spend on a unit?
A drum smoke is cheep to build and produces excellent results. Compititions have been won using these units. A new drum costs $100 in my area. Valve, black pipe, 90`s & fittings, grill, temp gauge, and building a basket can be had for about $50.
Do you like pulled pork? I put a 10# butt on the UDS at 08:00 one morning. Watched the unit on and off for a couple hours, it held a steady temp of 250*. The son and I left and went shopping, took in a movie, and made it back home at 18:00. At 19:30 we removed the butt from the UDS. My son and I marveled at our work. Wrapped the butt in foil for 45 minutes to rest the butt. MY GOD, we made pigs of ourselves. The bark was fabulous, the bone I wiggled out of the butt. The meat just started to fall away. Wonderful wonderful wonderful cooker.
It all depends how deep your pockets are. I wanted a Big Green Egg years ago when you could buy one for $500. Now they are $1500!! A co-worker bought a BGE for $1500 last week. Anothwer co-worker asked about a UDS. Another co-worker who built a UDS spoke up saying he bought a BGE, loves it, but his UDS gets more use.
I won`t BS you, there is a reason these UDS`s are so popular, the damn things work.
Vertical Drum Smokers