I also own single run MI-3, which I still use in one of my systems, and find them to be outstanding at providing those extra attributes you seek. Personally, never any problem, but check old archived discussions where Audiogon guru, Sean, pointed out his thoughts about greater ease of use and high quality with the smaller gauge MI-2.
In sequential open comparisons with MI-3, Reality Cables revealed more detail, three-dimensional cues in the soundstage, and bass slam. However, MI-3 quite spectacular in its own right if you want to stay with your present manufacturer. Although one factory rep to whom I spoke did not feel there would be a significant sonic difference, I also thought MI-3 bettered their MI-2.
If you are adventurous, check with Audiogon member, Clearsound, who sells Reality Cables for high quality systems, or realitycables.com