I just returned from Roatan... take both, I started to just go wide and leave the rest at home - I am glad I didn't... I shot a 100mm on about 1/2 the dives and got some amazing images.
Congrats on the baby Obello! I am interested in the whole lot - wont let me PM you - but if you would PM me your email and/or phone number I would like to chat about it.
-Tim