Does anyone have any experience of hybrid valve and solid state power amps?

I have a Musical Fidelity Tri-Vista hybrid integrated that is quite nice.

PS Audio BHK Signature 250

@bazb , 
hi, i'm also interested in Dyad amp. would you describe how the sound image portrayed in that setup ? what kind of music you tested in the audition? 
does it sound forward but seemingly relax and lean, airy and have more SILKY sparkle in the high ?
is it more spacious, orchestra instrument separation, airy presentation ?
is it capable to resolve complex passages & pop electronic music better ?
lastly, does it sound slightly veil or clarity with hear through effect ? 
any info would be appreciated. Thank you.
-phil 

PS Audio BHK Signature 300

I had the Rogue Medusa in my system on demo and it was a really good piece.  Outstanding dynamics, imaging, and soundstaging.  The fact that you can tune it with the input tube to cater to your system and tastes is such a nice bonus.