I've owned a C-Dory and now I own an aluminum boat, but not a Hewescraft.
Personally, I think you'd be hard pressed to find a better layout in a small boat than a 22 C-Dory. The use of space and the unibody build (no stringers - you stand on the hull) makes it a "big" little boat. I've never seen an aluminum boat built that way, so I would assume the Hewescraft has a raised floor.
Aluminum does have some dirty secrets - like galvanization, crevice corrosion, etc. Wiring of the boat is very important, because you can't ground to the hull...if you do, you'll cause problems.
Dings and dents - yep, I've put my share in the hull.
Generally an aluminum boat is lighter, so that does counter act some of the gas usage issues of having a deep hull. My current boat, Sea Badger, easily gets over 2+ mpg at 30 kts with a Yamaha 225 on it. My previous boat, also aluminum, sucked gas, but it had 2 motors which were much less efficient.
My current boat has insulation and a big pilothouse with lots of windows and it actually gets too hot, but just in case it has a Webasto, diesel force air heating system.
Bottom line is that my boat fits my needs and my uses. I think others will agree with me that every boat is a compromise in some way. You need to figure out how you're going to use it and what you can afford and then make a decision. My guess is that it'll never be perfect, but you'll be on the water and really isn't that the ultimate goal?
If I were to pick one of the boats you list, having gone through this exercise a few times myself, I would probably choose the C-Dory because I think my family would it enjoy using it more because of the layout. Then again, that's coming from a guy who owns fishing boats but no fishing pole.
