I'm looking at a couple Extreme Shallows and I'm I want to know from those in the know which one is the best for exploring and over all performance/shallow water ability. I'm not overly concerned about utility. This is gonna be more of a toy than a tool. Is the 18' footer a better performer because of its smaller size? Or is the 20' better because of it wider bottom? General thoughts on performance and shallow water ability would be appreciated.