Hi from Corvallis,
I've bought from Filaree farm and they sell nothing but organic, disease free, certified garlic so you're good to go with them. Lots of good information in their catalog too. They sell out early on the most popular varieties.
I haven't grown Oregon Blue or the Asian Tempest but the descriptions looks good. I think the asian varieties mature a little earlier than other varieties but how much I do not know. Garlic around here will be ready to harvest sometime between the 1st and 15th of July usually. We plant Kale for winter harvesting after the garlic.
If you want a couple of suggestions about varieties/types try one rocombole and a creole to round it out - unless of course you have all the seed you need. The rocomboles are good sized easy peeling great tasting garlic. The creoles are a hardneck that keep real well although they're pretty small in our neck of the woods. I guess the only kind of garlic I've been disappointed in is Porcelains, they're huge and pretty easy to peel but they only have 4 to 5 giant cloves, so about 25% of your crop has to be set aside for seed. I never seem to have the right mix of garlic for long term storage, etc. I'm working on it but we have not bought a single head of garlic since a few during spring of 2011 and we eat a lot of garlic. Ordinary organically grown California Early artichoke garlic goes for 6 bucks a pound in the stores here.
If you are truly insane, or have aspirations, read 'The Complete Book of Garlic' by Ted Meredith.
Another NW source for garlic seed is Whistling Duck Farm.
Sorry for such a long post. My name is Bill and I'm a garlicholic.
Bill
**Just a quick edit to 2nd the above post, I grow my garlic in raised beds and Killarney Red (Rocombole) is my favorite.