That's tough - Le Cellier, Prime Time, and Boma are possibly my 3 favorites, although they're all very different. I am also intrigued by Kona. I've had breakfst there but not dinner, which I hope to do on my upcoming trip.
Is budget a consideration? Prime Time can be considerably cheaper than Le Cellier, if that makes a difference. I love them both, but if I had to choose, I'd probably go with Le Cellier. Between Boma and Kona, assuming you've never been to either one, I'd go with Boma, because it's such a unique experience.