Your proposition is you can only have one "smoker" so I vote for a high quality offset, preferably a reverse flow. Then, I would get a 26.75 OGT and jusify it (if necessary) under the logic that you gotta have a grill too
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x44" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.