I've seen lots of vacation/honeymoon deals on Tahiti Air that tie in stays for OWB's for a very reasonable price (IMO), $3,000/pp or so for airfare and a week's stay in a OWB. I know there were some Hilton Properties - the Moorea if memory serves, not sure on the SPG's but something to consider.
If they have an SPG property you'll still benefit from the elite benefits.
I'm sure the price is for Coach airfare, but you can look into upgrading with points or $$$.
Staying in an OWB is on my list for a romantic getaway, but for the points redemption cost I'm leaning to something like this and keeping my SPG points for a better value.
Good luck and Congrats!