I have VTL 5.5 preamp, has bloom of tubes with speed of solid state. Huge soundstage, I love it with my Virgo II's. Get the latest issue of Stereophile, they give a glowing review of the 5.5 . I think they will give it a class A rating. I have had it for four months, and have not had any problems.
I have the VTL 5.5 pre, VTL ST-85 amp, and audio Phyic Virgos. This is a superbly engaging, musical system. (Most systems I listened to in high end shops left me lukewarm) My non audiophile wife now fights me for time on the rig. My advice to you : BUY the VTL 5.5 used. The price likely has gone up since the Stereophile review.