It looks like US Airways' problems will dictate our deciding to use accumulated miles, and Hawaii seems to fit the bill. My wife and I have dived about 45 dives each, all in the Caribbean. We hope to spend time sightseeing for part of the vacation, and diving the remainder (although we'd prefer to just dive one operator/island). That said, what island and dive operation would you pick, and (of course) why? What dive sites are the most special and unique to Hawaii? Thanks in advance.