Hey Kiwi,
I agree with Water above, check out Point Washington or Eden. Especially if your looking for quiet. The only problem I found with living on 30-A, especially in a condo or apartment situation, a lot of those units may be privately owned and on vacation rental program where you will have a new family each week usually from March to September. And while it is refreshing to have new and lively faces each week in your neighborhood , this usually dosent equate to quite, at all.
Heres a suggestion, Just post on here what your looking for, how much, and the said above ares, and usually prop owners are always looking here to see whats up, and if not them someone who knows about something.
The only thing is do you want to be with in walking distance of the beach? if so All of the above is irrelevant....
As point Wash and Eden are NOT within walking distance.
Good luck on your search!!!