I would go with the Soma, chances are if it does not have braze-on's the geometry/tubeset is not the greatest for carrying a load on the bike so it might be kind of noodly when loaded although it would probably make a good rando bike.

I also really hate p-clips, they do work but they never feel as solid as I would like. You can work around with this an old man mountain rack but then taking the wheel in and out is a little more of a pain. In the long run the Soma compromises a lot less and if you can make it work with your budget you will be much happier in the end. With bikes like this if you do it right the first time they tend to stick around for a long long time so might as well not cut corners.