I've used LHBS, Midwest, Northern and Austin Homebrew. Don't really favor one over the others - they've all been good. And, the times I've had minor issues with an order at Midwest and Northern, they made it right.
At some point, I'll put an order in with Brewmasters Warehouse (though it will be AG).
Atomic Dog Brewery
On Deck: Centennial IPA, Dry Irish Stout
P: Cascade Pale Ale
T: Carbed Crystal Light, Root Beer, Vanilla Cream Soda, Tripel IPA, Apfelwein
e^(pi*i) + 1 = 0