C2W - Dolan Mythos or Focus Cayo?

Thanks, I had half an eye on that - just because the frame is so good, but was under the impression this was more of a full-on race machine?

No more so than the Cayo, I would have thought.
http://www.bikeradar.com/gear/category/bikes/road/product/caad-9-105-compact-09-33260

I'd look into your riding position. If its going to be very relaxed for these long rides, then the Ribble (with its high headtube), could be your best choice. The Ribble does have a long effective top tube though, so its not ideal for everyone.