What type of vacation do you want to go on? If you want something beachy, bora bora or moorea is awesome, you could get one of those over the water bungalows. Or go on a scuba vacation: Ponape, Majuro, Truk and so forth. You're totally away from everything and everyone.
If you want to be the tourist and walk around and explore, the options are endless. Do you want Asia or Europe? Some of my favorite places in Europe: Spain - Seville, Majorica. Believe it or not, Croatia is stunning beautiful - particularly Split and Dubrovnik (a bit small of a coastal town though), so many places to pick!
I would probably pick an off the beaten path place. There is a pretty good book that I saw a while back, it's called 1000 places to see before you die (or something like that), it is full of great ideas. After looking at it, I realized how many more places I would like to go.
Good luck!