When I replaced the tires on my first TR3 (now 13 years ago), I found 165R15s at Pep Boys for $32 per tire. They were spec-ed for VWs, so they had a bunch in stock. Just about any tire will be better (grip, ride quality, noise, tread life) than OE and given the quality of OE steel wheels, it's not worth going for anything than the cheapest tires. You don't want nice grippy tires for wheels that will break around the lugs when you utilize the capabilities. Furthermore, in the world of tires, price doesn't translate to quality in more instances than other industries.