I have decided to start looking for a canoe to do some flat water paddling. Ideally I would like to use it to head out onto lakes and also float some smooth rivers like the Green through Labyrinth Canyon. I was hoping the paddlers out here could give me some tips on what to look for. I'm a big guy, 6'4", 270 lbs so I'm wondering if there is a specific type or size that I should seek out. Also, I've noticed there are some with flat backs so you can attach a trolling motor, seems like that would be a nice option but do you give anything up by not having the pointed end on the back? Any suggestions would be much appreciated! Thanks in advance!