Cary Audio SLP-05 vs Coincident Statement Line Stage

any reason you are constrained to these two in this price range? I think they are both fully balanced circuits so perhaps that's one of your criteria?  I'd include other choices myself.  The separate left and right volume of the Coincident is a non starter for me.  The gain specs are too high on the Cary to ever match in my system - 24dB balanced.

I have a set of Cary 211 FE mono blocks.....I currently drive them directly from my Aesthetix IO Phono-Pre with it’s stepped attenuators. I get fantastic, speed, detail, and sound staging, but the midrange is a bit lean for my tastes... not enough body/color. Cello’s sound too much like Violas. Looking for a Preamp ( must be balanced ins/outs as I run 4.5 meters of IC’s to the amps) that will give me more drive and body without losing what I already have. The Cary seems obvious, but I have heard great things about the Coincident Statement Line Stage too.