Krell KCT/FPB-300cx vs. Pass Labs X1/X250.0

I'm looking to upgrade my Pre-Amp./Amp. to one of these two Systems. The Pass Labs models are current and come highly recommended, but there is no local Dealer to demo. I'm well familier with the Krell pair, which I have heard many times, and have been mighty impressed every time.

My SACD/CD Player is Non-Cast, so I will connect via Balanced (XLRs).

Any experiences with this gear into Wilson Audio Speakers?