Choices are very personal.
I own a hard dinghy and wanted to replace it with an inflatable due to the sugerscoop transom on our C-320. After much soul searching and research, I decided to list and priortize dinghy issues based upon the way we typically cruise. I'll share my logic for my decision with you, it may be helpful in analyzing your needs.Where we sail, a dinghy is not always needed for cruising, but often one is very handy and for us it is a 'gotta own'. The winds here often exceed 20 knots, so towing is a hassle and flipped/submarined dinghies or parted tethers are common. These were high priority issues and dictated a stowable dinghy for us. I essenially singlehand (even with the Admiral aboard), so that ruled out foredeck stowage... I need to be able to move around fast and require an uncluttered deck for security.The swim platform is our back porch and heavily used, plus we sail at night, all of which made davits undesirable for us. This decision dictated locker stowage and ruled out a RIB. Boards are heavy and awkward but slats and HPRF's are not paricularly rigid for someone weighing in at 230lbs. I noted that when we used a dinghy, we regularly loaded it with heavy stuff (like water, beer, fuel, beer, ice and beer) while standing so we opted for the rigidity of traditional floor boards. With the additional stability of the tubes, it feels far more secure than a hard dinghy and you can walk around (carefully) carrying stuff in ours.I wanted a four stroke engine after owning one on my prior sailboat. We rarely go very far in the dinghy, so speed wasn't a big factor. I could hoist a 2.5 hp., Yamaha four stroke over my head with one hand. Since I am on the big numbers side of 50, weight and ease of handling was an important consideration. I like the features and price of the Zodiac 310. Hypalon/PVC was less of a consideration since it is stowed most of the time. I got an extra bag and stow the dinghy in one, boards and hardware in the other. This lightens the load, facilitates handling and even makes for more compact stowage. Zodiacs are common in this area, but used ones are hard to come by. I weighed this observation in as being complimentary. So far (six months), I have been well pleased with the choice and have hauled five, large adult males in it and found it very stable (after checking the load limits on the label the next morning in daylight, we started making two trips, <grin>).