Paul

I've not been to St. Lucia yet, but from everything I've read, it can be very romantic.
If they have the $$$$ - stay at the Hilton.
I've seen pictures of the rooms with a plunge pool overlooking the pitons and it sounds top notch.

Nassua would be a definite NO for a honeymoon.

I've been to Antigua and both my wife and I liked it quite a bit. LOTS of beaches and nice restaurants. I think the beaches are probably better on Antigua than St. Lucia. But you won't get the rain forest/mountains on Antigua like you would on St. Lucia. Curtain Bluff is a top notch hotel on Antigua that costs top notch money.

Try traveltalkonline.com or where2stay.com
They both have discussion boards for the general caribbean.

Hope this helps.
Email me if you/they have specific questions.

Scott