I auditioned the Virgos through SS at a stereo store, and I thought they sounded truly horrible-- congested, raspy, immediately fatiguing. I could not get out of the room fast enough!
I auditioned and eventually purchased the SF Cremonas. I auditioned them through tube amplification, and that is what I use myself.I have heard that the Sonus Fabers perform their best with tubes. I have never heard or read that they were somehow "voiced" with SS (and I am a Stereophile subscriber)
The Cremonas have such a chrystalline clarity about them. The midrange (which after all is primarily what one listens to) is magical and extremely involving. To my ears, and apparently a multitude of others, they sound MUCH better than ANYTHING else out there- and I auditioned speakers costing well over $20,000. I listen to my system for many happy hours at a stretch, and have never found them to be fatiguing. Indeed, they draw you into the music, and I keep hearing new things on my cds that I never knew were there.
Listen and compare for youself, and I'm confident you will go with the Cremonas!!