It's kind of hard to get through your posts due to the lack of punctuation. Anyway, just one small comment about this statement:
I know it's not name brand
National, National Panasonic, Panasonic, Technics, and others, are all brand names of the Panasonic Corporation (until 2008 Matsushita Corporation), which is the largest technology company in Japan. They are anything but a no-name brand; under the "Technics" label, they have produced (and still do) some of the best audio equipment there is, including the SL-1000 turntable, SP-02 cutting lathe, SE-A1 and SU-A2 pre- and power amplfiers, SB-10000 speakers, RS-1800 reel-to-reel tape recorder, and many others, to name a few. Pioneer, even Sony, get dwarfed behind Panasonic in terms of number of employees.
Your particular unit, the SA-6800X, was an up-the-line CD-4 receiver from the early 1970s—top build quality and great design. Further up the scale were models like the SA-8500X, which were even larger. As such, you will be able to get a lot of enjoyment out of your receiver; it does not even remotely have to hide behind hyped models like the Sansui 9090. However, as with most gear from the 1970s, one just should not expect ultra-low distortion figures, 120dB signal-to-noise ratios or enormous power reserves. Nonetheless, sonic-wise the machine will perform just as well as other half-decent or above amps/receivers, given it works within specifications.