Many have an MES (as do I) and love it. I'd recommend the 40" and recommend you get it from Sam's Club. You can pay an extra $30(ish) bucks and extend the warranty from 1 year to 3. The latest model has a 1200 W element and I'd make sure you get one of those. The MES has a few quirks, but the are still the best for the money.
Masterbuilt also has great customer service.
Bradley's are good, but they are smaller (maybe the equivalent of the 30" MES), and more expensive. You are also stuck using their pricey wood pucks. The upside of a Bradley is with the puck loader, they are a little more set and forget. I don't think the puck loader is much of a plus though as it is a mechanical piece that is bound to eventually break/fail.