My experience in Maldives was:
Kuramathi (nice sand bank at the end of the island, overall nice experience)
Sheraton Full moon (a bit more expensive and not my favorite)
Holiday Inn resort (nice compromise, beautiful terrace for sunsets, and you may use/collect Priority club points if booked directly)
Bandos Island (only 15 min from the Airport but still OK)
Kurumathi is my favorite though.
I would recommand to book the Seaplane transfer, at least on one leg. Fun to see guys flying the Twin Otter with naked feet!
In any case one week is enough there in my opinion, unless you're found of diving!