I have the 8100 and 9700 as well but in my systems I found the 9700 warmer than the 8100. I actually found the 8100 cool/very neutral though I'd agree with your descriptives of how it presents the various frequencies. They're both two of my favorite cables. It's too bad these top cables aren't distributed in the USA. I ordered mine from an authorized Japanese dealer through a shopping concierge that forwarded the purchase to the USA.
Nevertheless, I recently stopped using them and switched to some others I like in my current system and plan on listing the Acrolink for sale in the near future, I've got two or three 1.5 meter lengths and two 2.0 meter lengths of the 8100 and two 1.5 meter lengths of the 9700. If anybody is interested, I can list them sooner than. later if you let me know.