Dennis, I apologize. I just saw your question. I miss the way the MB-450s seemed to have limitless & effortless power. Music would crescendo and somethimes I thought a driver might pop out of my speakers. However, at low to modest levels, I like the VAC better. I am partial to piano and acoustic guitar. for these, I find that the VAC is more tonally accurate. On better recordings, vocalists are eerily there. The VTL sounded more like a facsimile. I am currently looking for a combination of the two. I do not have a VAC dealer nearby but I suspect that the PHI 220s just might be that combination.
What do you think of your VAC? Any thoughts for a Signature upgrade or s PHI?