Mert Congratulations on your purchase of the Krell Evolution 402. My local Wilson Audio Dealer is also a Krell Evolution Dealer, and I have heard the best demos at his Shop.
I also use the Wilson Sophia Speakers, and I recently auditioned the 402 against the PASS X250.5, and of course the Krell was much more powerful, but sonically it was too close to call, especially when considering it is double the price of the X250.5. The PASS to me, through the Wilsons, sounded a little sweeter and perhaps a bit softer in the best possible way.
I ended-up with the X250.5 + X1 + Krell SACD Standard MKII, and through the Sophias, it sounds simply amazing, and a reasonably good deal ($30K US-MSRP). Outside of PASS; Krell Evolution was "the best" solid-state electronics that I have heard through Wilson Speakers. The Krell Evolution Preamps and SACD/CD Player, also sounded excellent in the demos.
If I were to go with Krell, I would go with an all Evolution System, and run it in CAST mode, which is a nice step-up over balanced mode.
