yeah, basically any higher end Japanese frame-set from the 80s from the usual suspects is high quality for its purchase point. By the 80s the Japanese had their steel tubing at equal or above the Italians and English, and had manufacturing processes that were more efficient so they could make more bikes with higher quality control. So they turned out tons of high quality frames for many different brands, and most of them pretty dang good, and can be had for a song as there are just so many of them. Centurion is one example- but lotus, univega, miyata, panasonic, bridgestone, etc. it seems like Panasonic in particular is easily overlooked- very nice bikes.