I'm currently using a team pro on my LHT with the saddle height right at the handlebar height. I have to tilt the saddle a little more than usual and push it forward probably more than it should be but it puts me in the right position and feels comfy to me. I'm using it because I switched bikes. You probably want a B17 for touring. No springs suggested here too. Rather unnecessary once it's broken in.

The team pro takes for flippin' ever to break in. At least 2000 miles, though I am not on the heavy side.

Copper rivets I have found look nice, never snagged really, but are on there because they look pretty. : ) I think a normal one would do just fine. I think the Brooks folks say that they prevent tearing or separating of the leather from the rivets, but at least on my team pro I don't see how that's possible with 5mm of leather under me.