A Vacation Where You Actually Get Healthier?

My girlfriend and I are planning a trip around the end of the year. It's becoming apparent to me that lately most people's vacations cause them to get less healthy rather than healthier (e.g., eating too much, not exercising, stressing because they have to wait in line at Epcot ). We're contemplating turning our vacation into a "health retreat" and I'm looking for some ideas. Some possibilities include:

#1 - A yoga retreat - The thought of doing 4 hours of yoga a day is really appealing to me. Have never done more than a couple of hours and would love to see how my body opens up.

#2 - A cleanse/raw foods retreat - I've done cleanses before but would love to do something where someone else prepares the food for me.

#3 - A spa with interesting treatments - The luxury-type spas that combine high prices with semi-useful massages aren't really my speed. But a place that combines a cool atmosphere with stuff like deep tissue massage, rolfing, reiki, etc. would be really cool.

I'd love any ideas or suggestions for places. We live in Los Angeles and would love to be in a warm climate on our trip. Places like Hawaii, Costa Rica, etc. would be great. Thanks in advance for any help on planning a trip to our health!
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