Back when I was riding, my longest ride was 55 miles and I usually rode at a 12-14 mph average taking into account stops at the banana table along the route. I don't necessarily want my back perpendicular to the road with swept back bars putting my hands near my lap but I don't want a TDF posture either.
I also should have mentioned I need QR both f/r so I can carry the bike inside my van even if I have two 48x48x48 skids in there.