summer dive trip to south pacific

me and hubby want to dive someplace in south pacific. thinking about solomons, malaysia, indonesia. any advice?

Only one of the three countries you've listed is entirely in the South Pacific.

But anyway: While all three offer great diving, Indonesia with its vastness and diversity, is easily the best.
Some of the prime spots there include the Raja Ampat Islands, Alor, the Banda Islands, Bunaken, Sangalaki... google for more info on each.
But Malaysia and the Solomons could be great, too.

One thing to bear in mind is that getting to the Solomons could be a lot more expensive than to the two SE Asian countries.

best diving- Palau. Northern Pacific, but as laszlo noted you were lumping the pacific all together anyway. Maybe you should think about what else you want besides great diving.

Excuse me for the sloppy message. I DO have a map. Thanks, Laszlo, I'll consider your tips.