Best Receiver?

Nakamichi TA4.  Utilized Nelson Pass’s Status technology in the power amp section and sounded quite different than other receivers in its class at the time.

What speakers?

DeKay

I highly recommend the McIntosh MAC4100. It’s my favorite receiver compared to a collection of top end units. Another standout for me is Sansui Eight. The Fisher recommendations are solid too. I love my kx200, and just got an 800b back from restoration. 

Magnum Dynalab made some great recent receivers, and the Outlaws also quite good...as much as I like the vintage ones, even fully refurbished ones have lots of 50 year old parts and lots of potential issues and problems...

There has been a lot of shakeup in the receiver manufacturer ownership in the last few years and while it might mean nothing, sometimes these mergers and buyouts lead to a decrease in quality in pursuit of higher profits and sometimes they don't. First, Denon bought Pioneer, then Sound United bought Denon, Pioneer, and Marantz. One of the manufacturers who has been able to stay independent is Yamaha, who still makes all their own equipment. The reliability of Yamaha receivers is top of the line. So along with the others who have mentioned Yamaha, I'll throw in my two cents in a vote for Yamaha.