Nicest ride probably would be to hire a town car/limo/van to take you straight from the resort to the port, and then from the port to the airport after the cruise. If you have four or more people it's probably also the most cost effective. Resort-port-airport transfers in a town car will run about $220 plus tip. Cruise line transfers from airport-port-airport run about $75 per person.
If you have two people, cruise transfers probably would be less expensive, but you would have to take DME from AKL back to MCO and then get yourselves to where the cruise buses depart.
Another option would be to get a one-way car rental each way and I know people who have done it for far less than either of the above options. That obviously involves getting to the Swan/Dolphin or the CCC (or MCO) to get the car on the way, and some shuttling around at the port before and after the cruise. And it involves you driving yourselves around, which may or may not hold any appeal.