Duke of York Liveaboard
The Duke of York is an amazing dive yacht! The upper deck cabins are spacious with beautiful views through their expansive windows. The entire boat is roomy with plenty of public areas to get a little alone time, even separate and apart from the cabin. The dive boat is not your traditional Zodiac/Panga, but is instead a large Dhoni that mirrors day boats in other diving destinations--it's two decks with a roof over the dive area, which is nice in the hot, Maldivian sun.
The food on board is delicious, and there is a lot of variety. The staff is friendly and eager to assist. Best part of this boat, though, is the on-board masseuse, who worked hard during the trip I recently took (although I understand she doesn't come on every trip, so if this is an important amenity for you, check before booking). Overall, this is a luxury boat at a very reasonable price. It has ruined me for less nice liveaboards!