I have owned/sold these speakers in the past. Overall, I like what the speaker offers/can do! They are plenty clear, detailed(in the league of B&W nautilus, NHT 3.3 tweeter detail, and similar), fast, dynamic enough(inpart due to powered sub and multi upper bass/mid drivers), fairly coherent, exteneded, and uncolored sounding...as well as musical! They have kind of a Theil-like palate, which is clear. But then, you know that I presume.
The deal with the soundstage with those speakers, is that it's a bit "upfront" in the soundstage compared to others! I've noticed this with many associated gear choices with them. I've owned Thiels, Merlin's, Sonus Faber Electa Amator's, etc, as well as the MTS's, and I'm sure of my findings. The soundstage is simply not as 3 dimmensional sounding as some. But nothing's perfect. also, yes, you can experiment around with more "laid back" gear, like tube amps and pre's and such. This might greatly help.
for me however, this speaker makes a superb overall listener, for both all music and movie needs! Infact, as high end sounding speaker/transducer, not many does better for HT dubties at such a level! Infact, most high end "great imaging" speakers aren't as involving and dynamic as this speaker for HT!!!!...or rock, heavy dynamic music chioces, etc!!! Overall, I liked this speaker a great deal. And, it's classy looking..to my eye anyway.
Yes, cabling could help, regardless of what they're wired with!..that's been my finding. I don't know which SPECIFIC one's you're dealing with, as each is different. You might tinker there as well. Good luck