I cant see a person going wrong with the WSM.
Its under $200, holds approx 10 to 12 lbs of coal, and they say can hold steady for 18 hours at queing temp (200 - 250)
I myself have gotten 14 hours off of a loaded WSM before I had to add fuel (was smoking 25 lbs of pork butt for pulled pork sandwitches @ 250)
Yeah you can spend alot of $$$ on a big pit if you want,,, but from what I hear, you best plan on pulling up a lawnchair right beside it so you can tweak those dampers when needed.(which is quite often)
I myself like to do other things than just sit with my smoker, I have a maverick ET-73 digital remote therm that reads through the walls of my house (suppose to get 100 feet distance with it) Lets me get some ZZZ's in on those long cooks overnight.
My friends and family rave over my Q, say I should open up a BBQ joint, LOL.
I seen the Altan Brown potery smoker, Im sure the temp is very controllable due to being electric,,, but didnt use coal, plus he used wood chips, and I prefer chunks, and where was the water bowl to keep it all moist. My WSM is rock solid at whatever temp I dial it in on, and very moist finsished product with a smokey flavor, but not too smokey.
I have several pics of items Ive smoked on it, but not sure how or if you can post them here.
Best of luck,,, and I hope I helped.