Recently returned from a week+ visit to Grand Cayman and offer the following updates on restaurants.
Calypso Grill remains our favorite spot on the island! The food is excellent (sort of a French/Caribbean fusion) and the wine list offers good values at different price points.
Agua, which opened last year by an alum of Calypso Grill is our second favorite.offering a South American take on the Caribbean dining. The wine list also offers good values if you look closely.
We went back to the Cracked Conch, across from the Turtle Farm, and had an excellent dinner. (This related to but not the water bar in the back which has another name as well). They have stepped the food up a notch and offer some serious epicurean delights. The wine list, although impressive, doesn't offer many values or interesting choices.
Luca has a great interior, check out the fish tanks when you enter the lobby, and the food is good but not great. (The owners of Ragazzi have in interest in Luca).
We tried Tiki Beach for a evening dinner. This is a new place on the north end of the public beach along 7 Mile Beach. The food was ok, but eating at dusk the flies swarmed and we still had welts 3 days later coming home. I suspect once it's dark the bar has an interesting scene but we didn't stay late.
Finally, if you want a good burger, Aqua Beach has a very good one and decent service as well.
There are many other good restaurants on the island, but this summarize's our most recent visit.