driving Verity Audio Parsifal Ovations?

The 200 wpc follows from the fact that I have 200wpc right now, and to play my P/Es at 100db I need to drive the amp to 90% of capacity, so I cannot see how anything below 150wpc would allow me to play the P/Es at high volume. I do this very rarely, but I want to be able to.

I own the Parsifal Encores and have only used one amp with them - Jungson JA-200 200wpc pure class A monoblocks. This appears to work very well. Only reason I am chiming in is that in my experience, I need every single one of those 200watts to drive the P/E. If I crank up to about 100db my amp is playing at 80-90% output, so I don't quite see how any of these low powered amps could drive the P/E or P/O to high volumes.

Any new perspectives on this issue? I'm in the market for a new amp for my P/E's. Tubes need not apply, and I need at least 200wpc, preferably monoblocks - budget up to $7000 used. There are a few pairs of reasonably priced Classe CA-M400 listed. 400wpc overkill may be?