I started with a 14 ft aluminum boat, and everything the other guys said is true.
Then I bought a 17'glass boat with a 48" bottom, used, and I still have the same problems with balance and draft. It does hold better, and doesnt react so quickly to the oars, but I'm still not satisfied.
I'm in the market again, this time for a 16' x 54" boat, and I hope that will end the search.

Just another 2cents worth for consideration.