Observation
When people talk of JVC they speak of M-70, M-90, Kabooms and the PC series.
Now when people talk of Panasonic/National/Technics the stable is so much bigger
Rx-c100, Rx-c300, Rx-7XXX, Rx5xxx, Rx-a2, Rx-c4/5/6 series, the later Rx-ct and the cobra tops, add to this the technics boxes and the ultra rarities such as Rx-7700 and my National Rx-XE550
To me people are blinded by the M- series from JVC and don't think of so many other gems from the other brands.
JVC also used a distributor in Au, we never had the M-90 and back then the M-70 would have been big $$AU so are less common here, I have seen so many more sanyo's, aiwa's and national boxes here. (Australia used the National branding)
Second to this, Panasonic is as big or bigger than ever but JVC and Kenwood had to merge to survive a couple of years ago.
To sum up my thought, a king rules over all, small boxes,mid boxes, large boxes and component boxes. To me JVC does not fit this criteria and Panasonic does.
If we just talk of price and desirability in todays market i say the Discolite boxes. These were cheap light weight boxes that sell for much more than they deserve in todays market
Just my thought