So, no bench testing yet, but I have spent some time playing the Sisma 110/210 rig with both of my bands in a practice setting.
First up was the "acoustic" band, and I play upright and acoustic bass guitar in this one, so we don't carry a ton of volume, but feedback is often an issue with this band. I am happy to say that the Jad Freer rig did prove to be nicely resistant to feedback with this band. According to JF, the ports on the Venere cabs were specifically calculated to minimize feedback, and it seems they may have gotten that quite right!
Moving on to my rock/alternative band, which plays much louder, the Jad Freer rig had zero difficulties keeping up, volume-wise, and sounded great. I had lots more gain on tap, and it was very full and very clear. The Venere line is their "hi-fi" line of cabs, and it's aimed at being very accurate and balanced, with little to no built-in voicing. That sounded perfect for my acoustic band, but I was a little concerned that it would be too polite for my rock band. This turned out to be no concern at all. Man, it sounded great!
I still need to get this rig on stage at a proper gig, but so far, this seems like a "do it all" rig, at least for my needs.