Bahamas outter islands or turks & Caicos?????

[racer17m]

We are looking to do a trip to either the Bahamas or Turks & Caicos, we are looking for input. 

We are not really fans of over development ie Nassau so we started looking at green turtle cay (abacos) We dont know if there is a better option in the bahamas for getting the relaxing island feel while getting in GOOD diving, from what we have seen this might be a little vanilla diving which then opened the door for Turks and Caicos.

Im sure some of you have been to either or... or both any suggestings would be great!