Groneberg cable good?


I am using my 1990's audio quest Quartz and topaz cables still. 

Would new new groneberg quattro ref rca's be noticeable sound improvement. There over 200 bucks with the wet connectors.  Or stick with th audio quest Quartz cables. ?
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I would like to save some cash.   What about the guy here?  His cables look good, but will they be insulated enough? Rf etc. ?

www.amplifiersurgery.com

Silver solderd cables? Great reviews, would they be too bright ?
I used the Groneburgs for  few months , OK nothing more .
Cheapest Audio Anylasis and AudioArts were better .
In my system with McIntosh electronics, the Gronebergs are the clear winner compared to MIT, audio art, Kimber and Monster.
I tried the Teo GCs and didn't think they were better than my TS Premiums but am testing the HFC CT-1 now against them.