I've had good experience with Dr. Chronic but it depends on your geography. Most, or a lot anyways, of the American and European users on RIU seem to use Attitude, they have had many positive reviews, I'll be using them shortly. Good selection at both sites, good luck
i've used dr chronic but i live in the same country so no custom issues. i will give attitude a go for my next purchase. again they are in uk so customs may grab your bag.