Suggestions wanted.

Have a chunk of miles and a 241 to use up and Mrs LHR-HUB has decided that a summer holiday is in order.

3 kids - 12, 8 & 1 and we mostly want to sit about on the beach/ by the pool, play some tennis, maybe some golf and dingy sailing/windsurfing.
Sounds like the Caribbean would be the place, and we found some CW availability and Beaches resort in Jamaica, but is KIN as bad as the media would suggest?

Any other suggestions as to where we could go with some BA availability in late July/August (school holidays needed)

I know it's a bit late notice, so SFO, SAN etc are all gone.

Any ideas? (around 400k miles plus a 241 to use)

Thanks all - I'm sure we'll get some great suggestions from you lot, including some less obvious but fantastic places to go.