I'm just going through this decision-making myself, being relatively new to all this. Have a 26 foot power boat, which came with Weaver snap davits.
My analysis has gone something like this:
1. lots of rocky shores around here (Pacific Northwest), so can't see the sense buying something without a rigid bottom
2. In rigid bottoms, want to keep the weight down, and the standard RIB type boats with fiberglass turn out to be pretty heavy - I don't have & will not spring for the Seawise type system so will be raising and lowering this dinghy by hand with a line, and chances are will also be rowing it a good deal of the time as I like rowing
3. I do want an inflatable and not just a walker bay type of hard shell without tubes.
4. All of which is driving me pretty seriously to look at the brand new Walker Bay Genesis inflatable with a plastic hard bottom, brand new design which I've been very impressed with in the store, weighs about 100 pounds.
Now the only sticking point is the price tag, about $2,400 Canadian... Oh well, will wait for the boat show in Vancouver in Feb & see what's what.
Good luck!
Orcbait