I think I've got it narrowed down to a couple of dinghy contenders for my CD22 with a high radar arch:
--Weighing in at 38 or 50 pounds (depending on whether you count accessories), a partial hinged wood floor and a carrying capacity of 680 pounds (according to the Achilles spec sheet) is the 7'3" Achilles LT-2, for $983.
--At 48 pounds, with a high-pressure air floor and capacity of 500 pounds is the 12' Saturn SK396 KaBoat, at $549.
The KaBoat would obviously hang over the ends of the cabin; the Achilles would not. The KaBoat seems likely to be the faster of the two, and I like the high-pressure floor. But is it stable enough to serve as a proper dinghy?