For a honeymoon def BWV with a boardwalk view. We did this for our honeymoon and loved it. Point wise boardwalk view is about the same as standard as BCV. I can't say enough about the view. Also, Jellyrolls is a great time which is literally right there.
We have stayed at BCV and like it also but with the family. With SAB we think it is geared more for kids. It is a great resort and we love it but for a honeymoon I think BWV is the clear winner.
We have never stayed at BLT but think that you should stay at an EPCOT resort. There is just so much more going on over there for adults between EPCOT itself and the bars in the immediate area. The restaurants in both areas are comparable.