Krell Evolution 402 Vs. Pass Labs X.5 Series?

When I had Pass Labs x250.5, Valhalla IC and Cord was necessity. Sonicaly speaking Krell is totaly different than Pass. I had to also give up Exact Power since it is useless without a poweramp. Anybody who considers any new Krell amps must be avoided by Nordost Valhalla range. Because Valhalla works on high and low frequency spectrum very well in expense of loss on mids. IMO, Krell is very strong as long as bass control and quality plus highs concerned. But in return or matterfact you end up with a little dry sound if you use a solid state preamp such as Boulder.
Result:
Boulder amp+Boulder Preamp will sound best with Sonus Faber and Focal speakers. No matter which boulder you combine you will end up with dry sound with Wilson Speakers.
Pass Labs amp+Boulder preamp combination will need at least two Valhalla or similar cable together with Wilson Speakers.
Krell Evo amp+Boulder Preamp setup is unknown case, however, I have seen improvements after JPS cable took place between DCS and Boulder 810. If Aluminata cord and speaker cable make difference, it is a good news to me.(don't have cord and speaker cable yet) Otherwise I need to replace the Boulder 810 by LYRA Conn. 4-L-SE solid state preamp or ARC REF 3. Again I assume I use still Wilson Sophia 2.
But there is always a ''B'' route. My ''B'' route is Sonus Faber Amati Ann. where I don't need to replace my Transparent cables. Complicated isn't it?