Search is your friend, be sure to sort by relevance. The Prestige is a pretty nice bike, with Tange 2 Infinity tubing, Cyclone components (at least some years), etc. I had one earlier this year and it has since moved on to its permanent home.

Nishiki is just one of the long list of nice Japanese brands from the 80s. I wouldn't consider it unique, better, or worse than the other Japanese brands.