The only one I have dealt with in the US is Greenpoint in CO. They are good with service and pretty quick to ship. You can also send them cash and depending on your order size (my was too low for it, but I was doin' it on the cheap) they will email you a prepaid label to send in payment. As to strains, they are all Stardawg crosses (M) with a good selection of females. I am growing Sky Warden now and have Chickasaw Cooler for the next run. There is someone who is also running some of their seeds and has commented on them. Can't remember who, but I will try. Over all, have had no problems with them and everything has been good.
Hey, on a different topic, I know we kinda fell apart on the meetup. PM me and let me know if you are still interested and we can put something together.