I've got a ProQ Exel20 and I like it pretty well. It is a little more fuel hungry than the Weber SM 18.5 though. But.... The ProQ has built in probe eyelets, offers stackers for cooking needs, the stackers clamp together for easy handling when needed.. etc.
All in all a great smoker when you get it dialed in.
55 gallon smokin' UDS
BBQ Grillware vertical gas smoker
WSM with mods
ECB Deluxe (scrapped for parts for the UDS)
BBQ Grillware gas grill
Pro-Q Exel 20
High Desert BBQ