If nothing else, get the Wen No Nah catalog...it is like a text on choosing a canoe...or it used to be. Should be a link on their website.
This is a 17'6" Solitude, if I remember correctly. FAST, but sensitive to change. The seat was attached to rails to compensate for wind and weather conditions. Think it weighed under 40 pounds. This is an early solo designed by Jensen. Think down-river canoe racing. Got it used and spent about a month taking off the olive drab latex paint the previous owner had applied...with a spatula, by its appearance.
WenNoNah also made a solo/tandem design...as the others have said. Think it was 16'6". Seemed to be a good compromise boat..of the ones available at the time.
Then, see what Dagger is offering these days. This was their Tupelo..a Nessmuk shaped 10ft boat in royalex or the like...under 30 pounds...very handy, but with carrying capacity of under 200 pounds. With a double-blade paddle, it was like a water bug...skooting quickly. Seat was a basket weave on the floor. With the dog in it, it went like this /, veering to whatever side she would put her head on.
Those are pool noodles shoe-glued to the side. Sponsons can easily be made, but I figured when you start out with a purple boat, what difference could the color of the floatation possibly make? Jet skiers and ski boats in the near-by lake would create waves that would have the Tupelo going down one wave as another came up over the bow.
As I recall, WenNoNah, and most of the others are using "formed" plastic boats now...some are very heavy.
Good luck. Be safe. Wear a PFD...always.
EDIT: On knee pads...note the closed cell foam on the sides of the Tupelo...needed cushioning when I braced my knees. Depends on how long-legged you are, I'd guess. Also..Craig's list might be good for some, but good stuff goes fast there. Now is a good time to check around at big dealers and see what they have in used boats, don't be afraid to negotiate...cash flow is slow this time of year, although most have some snow-related gear to supplement their Winter month sales.
Kis
enjoy every sandwich