i too own a pair of grovers ultimate silver ribbons.
a very nice cable which i purchased in feb 2005......and an absolute bargain....
when it was in my main system(which includes tubes), i preferred it over the cardas golden hexlink, and yamamura 5000, as it gave me a blend of what both of these cables did, and that was what i was looking for.....about 4 months ago (may 2006) i replaced these with goertz ag2.....everything the grovers did the ag2 did also, but added clarity, transparency, and better bass defintion (not more bass, something the cardas did too much of for me in my system)...and the goertz let me hear more of how something was played, as this was also very important to my wife, a musician.
where are the grover's now?...in my bedroom system, hooked up to a tripath t- amp, and old('60s) hi efficiency jensen coaxial 10 inch speakers, sounding stunning.....