The cons of the reverse flow stick burner is they're a pain in the ass to clean. You can't just take out tuning plates and get inside to scrub the hell out of it. Lang smokers, all they sell is reverse flow but my uncle is Yoder till he dies and they're traditional. There's plenty pros and cons to both and a lot of afficianados will swear by either method.
Lang:
Yoder
As you can see, the fire box is on the same side as your stack in reverse flow. I've never seen a Yang in person but Yoders (ain't cheap) are fine pieces of American craftsmanship.
I've narrowed it down to these two manufacturers, want something to last me for decades.