KidK9....i'll be going to T&C the first week of Dec. so, i don't know how that is for diving. I"ve been to Costa Rica a few times....yes, the diving isn't the best in the world but it's good...alot of sealife. if you go and dive at Catalina or Bat Island you can dive with bull sharks and possible giant mantas. a friend of mine just returned from there a bit ago and he got to dive with bull sharks, and giant mantas. he had an awesome time on land and in water. he said he's going back again. He stayed at Ocotal Hotel and dove with them also. The viz. can range from really crappy to pretty good. Yes, Coco Island would be the ultimate in diving...but, that's a liveaboard. As a matter of fact i'm heading down to Costa Rica next weekend...a spur of the moment thing as to where someone is giving me the trip down for 1 week. So, since i haven't been down to T&C right at this time i recommend Costa Rica. if you have any other questions i'll be more than glad to help you out.