Thanks for all the input, folks. It's a 57cm and it is 531 in the main triangle (like my Supercourse, which I'm very fond of). The price has yet to be determined.
Dad's been watching but he's the quiet type. Here's what he has to say;
"I just looked at the forum. Pretty interesting. I probably won't do much
real touring with it. I like touring bikes mainly for the comfort on two
hour rides. The other thing is that for my rides I am on hills almost all
the time making shifting important. The 520 has index shifters but on the
down tube. The Surly has index shifters on the bar ends and lots of gears.
I probably could switch the 520 to bar end shifters. The 520 rode great,
but the shifting wasn't as precise as my mountain bike."
Thanks again folks!