Alpenglow Botanicals in Breck has an excellent selection, imo. I've never been a medical card holder, so I can't really speak to differences in selection (though I do know med patients pay less).
Check their facebook, they have all current strains and products.
They have about a dozen different strains, split almost in half between indica and sativa (maybe a couple hybrids), 7-8 different kinds of concentrates (both in terms of indicas and sativas, but also in terms of texture, e.g. "wax" and "shatter"), and 3 different kinds of edible candies (sold out for almost the whole month) and then the prepackaged thc infused beverages and chocolate bars. They also sell the 710 mini vape pens that I personally think hit about as good as any pen I've ever hit.
From what I've read, heard, and seen, I'd say Alpenglow is doing it right. Nice store, good helpful and knowledgeable staff, and excellent products.