I started going to Brew Brothers when they sold from out of their home garage. Now they are in a small warehouse space and they are friendly, have great prices, remember my name, will pretty much stock anything that you request they keep on hand.
Mainbrew, the dude thinks he knows everything about brewing and his way is the only way - scientifically proven due to his science background. I visited the new location recently and was shocked at the poor selection of hops. As for the selection of beer, you'll find MUCH more selection @ Johns
. I bought my first kegging equipment from them and then when I had a question about it the other owner told me that they never sold that kind of regulator so I didn't buy it from him. Still had my receipt of course and stopped buying from them after that incident.
Above the rest - worst store I've ever been in for beer supplies. Crazy as a loon.
Steinbarts - prices were high, service was good, selection excellent. Service dept for a leaking regulator - the guy told me it didn't leak, he was wrong. But they do have all sorts of parts that you won't find elsewhere locally.