The outback is built for stability it is not a fast boat.
You mention your weight, I'm more than that at around 220 pounds and I take my outback in the ocean which is a lot rougher than the average lake and feel very safe in the outback. If it's rough, water does come over the side but drains straight out the scuppers or the hole for the pedal drive.
So kind of depends if you want speed, or stability. If you want both, could get an outback and add some kind of motor like say, a bixpy, I have done this and it's made travelling decent distances a breeze. Love my kayak
