Any of us could go into business as a marine surveyor--I say that because the crew on this forum is well informed and have encountered "surveyors" who are not. If any of them raises the problem of blisters let us know and we'll have a good laugh.
Brent, the fiberglass Carver might be heavier, but in lots of conditions your M will ride better. Fiberglass has great impact resistance (to a point), and is stiff. In many sea conditions the AL hull has enough "give' to it to provide a better ride, however.
If I were selling aluminum boats, I'd have some pictures like these:
http://www.rocksaltboats.com/ (Click on "fiberglass fun").
Joe
1977 28' Express
Twin 318s, raw water cooled
Ohio River