I love old steel Treks! I had one of those charcoal 560's, but it was a little rusty being from Hawaii. Also had a white purple 1000 with tri color 600 transplanted onto it. Here are mine at the moment, and they will have to be pried from my cold fingers, lol.
1985 600 with 92/93 7 speed 105 transplanted. Awesome riding bike that seems to have been made for me...!
1979 510. Ishiwata 022 and loaded with campy with Universal Mod 77 brakes. Can't say enough about how it rides/handles. Just amazing!