the upcoming four seasons
(currently taking reservations from Oct 1)
looks cheaper than st regis >

overwater from $1120
overwater with pool from $1565

theres also 5th nt free, which can also let you avoid 12/24 and 12/31 premiums

you might also consider the maldives, especially for 2 weeks.. four seasons landaa giraavaru and one & only reethi rah are very well regarded here. much better value than bora bora.