In offsets, you have the inexpensive models -- Charbroil, Brinkman, Chargriller -- all in the $200-250 range. I used a Brinkman for many years & cooked a lot of good stuff. In the past year, I retired it & replaced it with a Chargriller. The CG has a few features - main chamber ash tray, SFB ash drawer, cast iron grates -- that I liked better than the Brinkman.
Between those & the $1000-1500 Horizons, etc; the choices seem to limited. The higher end offsets will burn less fuel & require less tending. They are without a doubt great cookers. Will they automatically make better 'que? Nope. It's your cooking skills that ultimately determine the quality of the end results.
I would love to have a Horizon or Lang & one day I may just spring for one. But for now I don't mind having to fiddle with the fire every couple of hours. A cooler of beer & a few hours "playing" with my CG is good therapy. The bonus is in the end, I have some delicious food to eat