John's tires are excellent in quality. I have a black wall set of chain treads from him.
I prefer new tires over old ones. On the old nylon cord tires, the sidewalls often crack open or the bead won't hold its seat anymore. The old, pre-war cotton cord ones in particular can be hazardous if you're riding much because the cords can rot from within the tire, creating an unforeseen blow out at the worst time. I think old tires look great for display on an old bike, but I don't ride them a lot. I can see the occasional, casual ride on old nylon cords, but with the miles I put on my bikes, I just get new tires.
I had a Columbia with a set of Schwinn Typhoon reproduction tires that actually were pretty good. It was a pleasant riding bike and the tires served me well.
I was not impressed at all with some of the cheaper offerings like the Cheng Shin white walls I had on one bike. They had a spongy, slow feeling to them when ridden.