Alright - some amazing options here and as most folk indicate, get them in the water...thought I would jump in and see if I could take a new tack.
I am looking to pick up a solo boat - American boats not really an option with exchange and little desire to do a cross border run.
How about some comparisons? Nova Craft Fox 14'; Nova Craft Super Nova; Swift Keewaydin 15''; H2O 16/6; Souris River Solitude; Clipper Caribou S - differences between the shorter and broader Nova Crafts and narrower 16' boats? Some previous discussions above about hull speed, tracking and efficiency with respect to length and surface area got me thinking that maybe not as important when not racing at optimal speeds...
Super Nova is an outlier here as more WW but any experience with it as a flatwater tripper as well? Similar to Pal or Bob's Special or strikingly different? How much does one lose in compromise with the smaller tandems? Width and stem height do appear to be a limiting factor.
I am 215 lbs, 53, 30+ years paddling mostly tripping on flatwater in tandems, some solo WW courses, C1 flatwater training, comfortable on and in the water, kneeling, Canadian style paddler, not hit and switch or double blade, looking for challenge, efficiency and responsiveness rather than stable fishing platform and now looking to do solo fitness and tripping (2-7 days) - narrow flatwater, Canadian Shield - if buying used will likely look into a used solo WW boat too...seems one can never have too many boats.