We should have met up - I just got back from a wk in Hawaii on Monday night. I found the diving off the Big Island to be quite nice, mostly north of Kona. My overall number of dives are not high, but I've dived off the Great Barrier reef and the Caribbean and I thought the dives in Hawaii were equal to those, different - but equal. Saw one white-tipped shark, and little to no algae. maybe there are big differences between the islands. I also heard the visibility was low the week before I arrived due to coral spawning.