Best diving I've done is in Lembeh, Indonesia.
Check out the Lembeh Resort. If you want to see 'cool' stuff, this is the place to go. Tons of frogfish, octopus, bobbit worms, seahorses, ghost pipefish, scorpions of all different types, pygmy seahorses, and that's just the beginning.
This is muck diving, but combined with nearby Bangka or Bunaken which are gorgeous blue-water sites, couldn't get better...
Have a lovely honeymoon, wherever you go.