Comparing some mid-line interconnects - thoughts?

Hmm...I wouldn't call AQ's US$1K-per-meter-pair Cheetahs to be 'midline' or midpriced, I'd call them expensive.

I just replaced 6 pieces of HomeGrownAudio's all-silver IC-4-based ICs with Cheetah. I heard more detail, less edginess, and more-real-sounding transients on orchestral percussion such as tubular bells. I've never heard your other candidates.

Also, do consider PS Audio's silver conductor IC. It's quite affordable at only $350 per meter-pair and apparently sounds very good. See 10Audio.com's review...http://www.10audio.com/psaud_ref_trans.htm
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Try Blue Jeans cables. Nothing is more accurate. Try the Belden 1505F. The price is right.

I would also try "Revelation Audio Labs".

Both the Audio Art IC-1 and Speltz Anti-ic easily bested the Blue Jeans cables Belden 1505f that I had. Much better clarity and imaging.