1. WSM (18.5 or 22.5)
2. Akorn kamado (its a grill that does a great job smoking and like all kamados is extremely efficient, but some people don't care about this)
Any of these 3 would be a good choice. If you want a dedicated smoker, go with 1 or 3.
Weber One Touch Gold
2001 Weber Genesis that is no longer used since the OTG