I'm partial to the Astrons, primarily because that is the only high 
current supply I have ever used.

I have 1 RS20 that is 30 years old, and another that is at least 20.

I had two RS35's until one was fried in a lightning strike last 
spring, but the other one is still solid after 10 years, and powers my 
TS570 with no problems.

None of mine have the meters, but that really doesn't matter.

You can adjust the output voltage on either the 20 or the 35,, but you 
have to take the case off to do it.

I like them, because they just sit there and work quietly, and do not 
require a fan.

Mike Duke, K5XU
American Council of Blind Radio Amateurs