The XLO Signtaure is by far the BEST copper cable I have experienced in my system. However, I would not describe them as "edgy" or "analytical".
I have.
Chris, I'm glad you are really enjoying the XLO Signature 2's, but remember, cables are system dependent.
You have a warm Cary tube integrated amp, and warm Sonus Faber speakers, so I'm sure the speed and resolution of the XLO mates well with these. However, I have heard XLO sound thin and bright on equipment that is not so laid back.
I myself now use silver cables. I tried silver cables many times over the last 15 years and NEVER liked them. They always sounded thin in the highs and bass. However, when I changed speakers to full-bodied, warm speakers, I found that silver cables now sound wonderful.
In my experiences, XLO is the only copper cable I've heard with the speed and clarity of silver. FWIW, I don't count Nordost Valhalla as copper, as it is a hybrid, silver clad copper. This speed and clarity will work well in a warm, full system, it can sound like nails on a chalkboard in a transparent system, IMHO. Just as Cardas/Jena Labs/etc can sound wonderful in a bright system, but can sound lifeless in a warm system.
Just my $0.02.
John