Hi cleung, I live in the keys, and have worked the shops in Key West,and, though some of the reefs are pretty impacted; many are not!The sambo's reef system, the Western dryrocks,and some of the reefs out toward the Marquesaes, are beautiful!!! Don't go on a cattle boat, Hire a six-packer, tell him what you want, and he will get you to beautiful reefs, from 25- 50 fsw. Plus, that have a bunch of wrecks, from,60-320fsw, depending on your level of EXPERIENCE, not just a certification! Then lastly, you have a tremendous variety of night life, bars, clubs, harbor area, mel's place, museums,local history, and lore, God, I love it! Very important, be flexible in your views about life styles. There are many,and some,VERY DIVERSE!!!....CAPT tOM