Again - It Depends!
The best dinghy IMHO depends on what you're gonna do with it and how you, your boat and crew can handle it. We have the dreaded PVC Zodiac (10' 2") with a 6hp Yamaha. It has not fallen apart as predicted and it has served us well. It is too long to lay on the fore deck of the h31, for long passages, and the 6 hp is barely adequate when we have 200 pounds of water (in jugs) in the dink with us. We have bought a dinghy motor davit which we will install shortly. It is difficult to get the outboard from the stern rail to the dink stern when the dink and the mother ship are bouncing independently. The RIB is nice when beaching where there are rocks and/or shells (or anything sharp) on the shore. Our dinghy has a PVC floor and we had to get out of it a little off the beach and anchor it off. We made it work and it will have to last for a few more cruises! The best dinks we saw in the Bahamas were 13-15 foot Boston Whalers with big out boards. They allowed folks to leave their boat at anchor and travel long distances by dinghy for supplies. For this youneed a BIG boat. Most people had RIBs with 9.9-15 HP outbards, and they had dinghy davits. We really liked the "AquaScan" RIBs because they build a compartment in the bow for the gas can and the fuel lines run inside the floor back to the engine. No mess! A hard dink with a sailing rig would provide the ability to cruise around the anchorage, but you need the space to store the mast and sails. We only saw one sailing dink in 6 months, but Byron was having a blast while we watched. We saw big boats with both a RIB and a hard dink. If you only need to get out to your boat at her mooring, then a good sized inner tube would work. Even better would be a floating lounge chair with TWO beer holder sockets! So IMHO, the dink needs to fit its intended uses(s). Good dinking around. Roger and Susie Mummah, s/v Endless Summer