See my additions below for why I think you should try LC before you give up on the Caymans
Fly non-stop out of Houston in United, short extra flight puts you in LC.
When you add up all the cab fares, comparable resort hotels, food, diving, etc. the price is not that much cheaper than an all inclusive package on LC
No need for a car on LC and you would see more iguanas on the road than cars if you did decide to rent one.
Reefs are light years better and healthier on LC
I hate drift diving, so this is a wash. Moored dives on LC mean no follow the leader with a group. You can dive anywhere you want with or without the group and DM.
Great food at the resort, included in the package and just steps from your room
Valet diving is as easy as it gets and if you work within the limits the DM has time wise, they can be very flexible.
Everything you need at LC is within about 150-200 feet from the door of your room. Bar, pool, dive shop, boat dock, dining room, beach, spa.
What difference does an extra hour or so in the air really make Once you go to the effort to get through TSA and on the plane?