There is lots to choose from. Wow
Grant is good at Amigos.....Rudy from Bottom Time is good...very calm guy....made most of my dives in Belize with him.
Mike and Dawn at Barefoot can hook you up too.
There are some good freelancers too....a guy named Jim...ex-Cannibals owner....think you can book him out of Blue Hole Divers on Front Street. Also a guy named Roland....very laid back, calm British guy...call him on his cell phone when you get there...014-4520.
Shop around....can't go wrong with any of these.
Have a safe and fun trip!