So let me get this straight, I own and love my Collins R-390A vacuum tube receiver from 1967 and I believe it is the finest Analog receiver ever made and it’s #10 on the Sherwood list.
There is no way that the old R-390A has a better receiver than the SDR2! How can you compare a 70+ year old analog tube radio design against a modern digital SDR, It’s not a fair comparison two totally different technologies.
As far I am concerned I would not take the Sherwood list as the only deciding factor in buying a radio as there are many other factors to consider.
I have owned a few of the radios on the list such as the Flex 6700,6600M even the old Ten-Tec Orion II all of witch is closer to the top of the list. All I can say is My Expert Electronics MB1 far exceeds the performance of any of the prior radios I have owned in all aspects. And certainly has more features than my old Collins R-390A.