I like Dry dock... it is one step above home brewing (in the experimental, no holds barred kind of way) and Avery. Adam Avery has dome some very interesting things with fermented beverages the past few years and I applaud him for that.
If it's local, I like it. I try to get local beers when I travel. Back east is pitiful. In Boston you ask for a local brew and they had you a Sam Adams. It's like being served Coors as the intimate local beer...
Great Divide
Mtn Sun ( Vine Street)
Breckenridge...meh I like the 471 but most of their beers seem pretty lifeless
Golden City
Dry Dock
Avery. I know it is in Boulder but still kicks ass!!!