My boyfriend and I are heading to MX for 2 weeks from Jan 5-19. We are doing a week in Coz and using Dive With Martin as we always do....my question to all of you is we were considering a week in Cancun for one of those weeks...is the diving in Cancun worth it? Would staying in Coz for the whole 2 weeks be our better bet? Are the odds of bigger fish like spotted eagle rays, sharks of the not nurse variety, whale sharks, etc better in Coz or Cancun? I know we love the diving in Coz, but we were tossing around the idea and looking for your opinions. Thanks in advance!