The concensus seems to be that Gumotex are expensive, unless you get them second-hand. The Stearns back Country is the most canoe-looking of the range, and its flat sides make it easier to paddle and makes it roomy, but the seats are not great. The Sevylor Colorado wins out on being able to take the most weight and it is widely agreed that the seats are particularly comfortable.
If you want more detail, you can see the full reviews here: Song of the paddle
Further reviews are available online at Amazon