I use an Audible Illusions Modulus 3A tube preamp with my Stereo Stratos Extreme Plus+++ amp and it sounds incredible.
I got to say, I really love the sound of my Stratos Extreme mono's paired up with my Audible Illusions 3B.
When asked, "How does it sound?" I pull out my never fail, cant miss records

Heavily modified vintage Thorens with modded Denon 103B
Audible Illusions 3A
Odyssey Stratos Extreme monoblocks
Von Schweikert VR-2's
Velodyne F-1500
Quality Records 45RPM Fleetwood Mac Rumours - "Gold Dust Women"
or
Quality Records 45RPM Dusty Springfield - "Just a little lovin"
The smoothness of the tube preamp coupled with the lightning fast impact of the Odyssey amps quite simply "Blows people away".
This basic system just plain works. Synergistic would be a way to describe it.
I think a tube preamp works fantastic with the Odyssey amps.