I'll add the following thoughts to my question about the componentry on the Vita Comp.

As between the Surly, Soma and Jamis, do you have a sense of which bike's geometry will work best for you? That, in my opinion, should be your biggest consideration. Beyond that, it may just be a function of budget. You might ask your LBS if you can swap out the components that come standard with the Jamis for those that are on the Vita Comp. Then sell the Vita Comp, as you'll get more money out of a complete bike. That might be the most economical of choices.