Sannie is an excellent breeder with fantastic gear. Almost all accounts have his Jack F7 as THE Herer to get.
Mr. Nice has many originals and there`s major fire in his seeds. If you are looking for a few select strains, perhaps for breeding, I would look at NLxHaze, Shit, Mango Haze, Black Widow, Ortega and a few others with different genetic backgrounds. Neville`s Haze.
I`m interested in Peakseedsbc.com but I do not have any experience growing their gear. I would say that from all reports it looks and sounds like fire and they have some of the originals, and the originals mother and father plants are unquestionably available on the island so they are likely legit based on all the positive feedback I`ve seen coupled with none negative. Cheap cheap cheap too. I`d probably get their Sweet Skunk, Blueberry and NL if you are thinking breeding. If you want potent hybrids I would lean towards the NLxSkunk from them, but that is because I love skunk and the NL tends to cross well with things in that it doesn`t over influence the end result`s effect, usually just improves it (same reason I recommended NLxHaze above).