Can't comment on the Silver Anniversary cables, but all the Siltech cables I have used (principally the Compass Lake ones, admittedly expensive) were very smooth and natural in the highs. My problem with them in my system was that they were just a little bass-heavy for my taste. Also disagree with the prior poster, I have heard many good things about them, the problem is their outrageous cost.
Question for serious Siltech users
Are their cables known to be etched at all and do they emphasize vocal sibilance ? I am most interested in comments on the Anniversary cables such as 770i. I know they are silver based cables but supposed to not have the typical silver sound. Any comments from users would be very much appreciated.