-- Last Updated: Jun-21-12 11:02 AM EST --
I have a Supernova, and though it's a bit larger of a hull than a lightweight guy like me needs, I really love it, and like the way it doesn't become sluggish as quickly with increasing gear loads as my other canoes do. If your J-stroke is any good, you'll have no trouble controlling it. I've cruised for hours at a time on flatwater with mine, and would say it's not my first choice for that, but it's very tolerable. For the frothy stuff, it won't spin like a whitewater boat, but it'll pivot and crank tight turns at least as well as any non-whitewater boat I've seen in action so far. Also, even though some say it's too squirrelly for flatwater, for a big guy like you, it will be less squirrely than it is for smaller folks. I've never paddled the Freedom Solo, but it is small enough in comparison that I'm not so sure its handling wouldn't suffer when loaded the way you intend. There's another pretty big basic difference between the the Freedom Solo and Supernova besides the overall size and volume. The Freedom Solo has nearly all of its rocker within three feet of each end, while the Supernova's rocker continues right to the centerpoint, resulting in kind of a rounded, bowl-like zone right at the middle. This looks a bit unconventional, but I've learned to like it.
Regarding the foot-entrapment issue, the Supernova has pretty high sides AND a pretty high seat, noticeably higher than any other solo canoe I've tried so far. I'm comfortable with seats a few inches lower when my size 11-1/2s are tucked underneath, so I'm fairly sure you'll have proportionally more foot room in the Supernova with your size 14s under the seat, but whether your clearance-comfort level matches mine is something I can't know. You could raise the seat from its already-high position. There's available room to do so.
Another thing about the seat. It's positioned so that the boat is trimmed when you have a single large pack in front of you. If you use two packs or often paddle without a heavy gear load, you'll want to move the seat forward so that the back edge of the seat matches the original front-edge location. Just about everyone with this boat makes that change.
Okay, here' more info for comparison purposes and another general comment about the boat. Someone commented about how the Rendezvous slices through waves rather than ride over them (and I've heard that complaint other times), but the Super rides waves very well. Also, the rounded profile is very "non-grabby" and forgiving when side-surfing or hitting really sudden cross-currents. It won't get rolled in those situations very easily (that's not a comparison to any of the other boats in your list, but rather a comparison to a few other general-purpose boats I know).
Okay, more stuff: You asked for "cons". I can think of only two, and of course they must be viewed in "relative" terms. The Supernova is a bit tough to paddle in strong wind, but you are big guy and probably need a big canoe unless you compromise and make your gear-laden trips of secondary importance. Regarding the "squirrelly" handling, yes, it will pivot one way or the other as soon as you relax your attention to correction, and that would drive some people nuts. If maintaining constant control of the boat has become natural for you, you won't fret about this. It only bothers me when I want to take photos on the fly (in the time it takes to put down the paddle and get the camera out of the Pelican box, the canoe has turned to face the wrong direction). On the bright side, in a strong wind it's actually easier to put a squirrelly boat back on course than a hard-tracking one. It's all a bunch of compromises anyway, right?