I like Castle Seeds.
I have had a 100% germination rate so far, I've bought about 100 seeds and have started them for other people and now myself, so far 58 out 58 seeds have germinated. It took about 2 1/2 weeks to get my seeds but that's only because I live in the USA and our customs are very tight. They also provide a guarantee, if you don't get your seeds they will replace them, as long as you choose their tracked shipping option. Very nice stealth shipping, they also shipped in plain padded packaging and the seeds are in the original packaging from their main seed suppliers, no "bagseeds" there.