Solid state to tube

can somebody tell me the absolute worst kind of music/sound recording to play through tubes?

It's my opinion that small signal music seems better handled through tubes though there may be some tube noise in very small signals like LO moving coil cartridges amplification. 

It seems to be more of a toss up as the signal strength increases through amps.  Then it's how good the designer is and how their equipment is voiced.  My preference is for a particular type of solid state amp design.  But my preamp is all tube and phono stage is hybrid.    

Quicksilver is great equipment.    I just pulled a pair of Mid Monos out of service and they were one of the best amps I've ever owned.   Seriously good stuff for the money. 

Cannot say enough good things about Quicksilver. I own Mono120s using KT120s and drive them with either his Line Preamp (6922 version) or my AI M3B, and this is an end game set up for me, period. The power, dynamics, and naturalness of instrumental timbres (woodwinds, cello, French horn, lute, piano, etc) are just "right" sounding.

Suggest you also try an ARC pre-amp if you can.  They have been "known" for building quality pre-amps since the early 1970's.  I recently bought a used SP-6A for about $800.00  It is miraculous, and I was using LUX tube pre-amps before that, which were not really "bad."

Just a suggestion.  I am sure you will be pleased with whatever you finally buy.  Be sure to try it IN YOUR ROOM before you buy if you can.

Cheers!