Olympus labs PHs - good to go, more expensive, but often higher dosed
Primeval PHs - good to go, usually cheaper
Black stone labs - Often bunk, untrustworthy, overpriced
Also check out Sparta Nutrtion. Newer on the block but a myriad of logs around here on AM and all with impressive results. Prices and dosages are on par or better than OL and tetrasorb technology to enhance delivery of the actives.