Late to the party, but being the 250lb pound guy with gear, I found my 90's Koga Miyata touring hybrid to be like riding a slinky with any kind of load on the back. I'm pretty sure it has the same tubing as a Miyata 1000. I've rode the heck out of it this summer unloaded and its been great. I have a mid 90's Cannondale T700 that I'm going to transfer the cockpit, drivetrain and racks over to. I'm assuming the Cannondale will take a load as well as a Surly frame, and the the Koga will get drop bars and eventually a lighter wheelset. So while its obvious that you need both bikes, I will throw out 250lbs as an arbitrary weight limit on the touring vintage frames, but they are a great Sport tourer for a larger person. I do have a unridden for 30 years Bridgestone T700 with a full set of Rhode Gear luggage that I want to keep as a period piece, but my assumption is that any touring would be overnighters with lightweight gear.