I have my own opinion on inflatable dinghy's versus hard and I know this is going to get some interesting responses. I like the look and versatility of the inflatables; however, everyone I have ever known who has owned one over the years experiences some kind of leak and needed patch repair. I keep my boat on a lake and several of my dock mates have inflatable dinghy's. Most of the time they are in some collapsable state and need to be pumped up. If your going to use a mooring and not planning on stowing on deck, personnally I would look at a hard dinghy such as the Walker Bay (West Marine carries them). They are stable, lapstrake designed, easy to maintain and will not need to be pumped up on occasion! Cross over a jagged reef, beach in confidence and hang onto it for years well after an inflatable has thinned out in the sun, ripped and been patched over and over again. One added feature is that it has a sail kit option and even the inflatable collar add on. If you really want to have fun, go to "Woodenboat" and buy the pram rowing/sailing/dinghy you can put together in your garage as a kit.
my 2-cents on the subject
Bob