I would suggest that you get up to Council Bluffs on Friday night for the BBQ at the Bluffs contest. This is a KCBS 'pro' contest with some pretty good teams. I'm going to miss it this year because of a conflict with my Sam's local, but it is a good contest to walk around and see everyone's setup. If you are there Friday night, most teams will take the time to talk to you and show you their cookers. You will get a good idea of what other guys are competing with and and idea of the range of setups.
Also, join GOBS (Greater Omaha BBQ Society). GOBS is about all things BBQ and competitive BBQ is a big part of that. Look us up, come to a dinner meeting or two, and get to know some judges and competitors.
WSM's are fine cookers, but you might also want to look into pellet grills. With the pellet grill you can worry about cooking everything properly and not about fire management. It would be the closest thing you can find to your electric smoker and will probably make you more competitive quicker because of the shorter learning curve. I think HUB will be at competing at Council Bluffs, stop and talk to Ron about competition cooking, classes, cookers, etc.
PM me if you have something you don't want to ask on an open forum. I am in Gretna and got hooked after a backyard contest about 3 years ago. There is no easy way out and support groups are limited.