I stopped at a bookstore a week or so ago, and picked up 4 of the 5 beer mags they had on the shelf: Draft, BYO, Imbibe, and Beer. Decided I'm going to subscribe to at least one of them, haven't decided which one(s) yet.
BYO is an obvious choice, simply because it's focused towards the home brewer.
Draft, I've picked up a time or two before and am overall impressed with the publication.
Imbibe, I'd never seen before, and haven't looked at enough yet to decide if I like it. Seems like it's a little broader, not focused entirely on beer.
Beer, I've had a subscription to before. Kind of torn on it; it's got a good mix of articles (good), but almost feels like it's geared towards the college crowd with the beer games (bad, for me... I don't like people telling me when or how to drink). It also feels like Maxim decided to publish a beer mag, with the "sex sells" girls on the cover and featured throughout (goooood)