have you checked eBay for another Nikko? I see Nikko preamps and tuners regularly but I haven't looked for Nikko receivers.

If you want to stay with older gear, maybe a Marantz or Pioneer receiver or Sansui receiver. I like the Sansui integrateds too. I have an AU-5900 that's a fun piece.

If you're looking for something new, post with a budget. There are only a handful of manufacturers making new stereo receivers - Harman/Kardon, Marantz, Denon, Music Hall still make stereo receivers and maybe Yamaha. Magnum Dynalab makes a really nice one. You'll have more choices if you consider integrated amps too. Here are links to the Magnum and the Music Hall receivers:
http://www.audioadvisor.com/store/pr...reo%20Receiver

http://www.audioadvisor.com/store/pr...reo%20Receiver