150,000 miles would be a good use of miles for a trip to HNL in F, provided you are the only one flying. So perhaps a ropey start to a honeymoon...

2 for 1s are only useable on BA metal. BA doesn't fly to HNL.

So if you want to use a 2 for 1 then that would be 150,000 to LAX for the 2 of you (on BA). Then you'll need the excess miles or cash to fly the 2 of you to LAX.