I've looked at several sit-ins, but
saw an article that said SOTs were the best for expedition since they are
inherently safer.

I would be interested in knowing the source of that information. I have never
heard of anyone doing an "expedition" using a SOT but plenty in decked boats.

Find the local kayak club and talk to some paddlers. I have paddled the prism
and I think you will enjoy a decked, composite boat a lot more.

Brian Blankinship