Have decided on a new 21SF. I have a new 90hp merc fourstroke. Planning on installing it on the 21SF. Might try and sell it so we could upgrade to a 115. Either way were going with two 25" tubes. Would there be any benefits to going with the dual eliptical tubes vs the round ones ?? 80% of our trips will be the wife and i fishing. Other trips would be with the kids and grandkids. Six adults and three littleones. Mostly cruising, swimming and some tubing. Local lakes can have waves from 2-3 ft in really windy situations. Usually dont get out when its like that but sometimes get caught in bad weather. Boat traffic creates most of the bad wave action on these lakes. Currently thinking about adding strakes to the round tubes. Appreciate any input from ya'll.