Philipwu, I have been able to sort out what kind of amp you have. Does it have a balanced input? How long do you need the interconnect cables to reach? Have you considered the effect that preamps have on the cables?
FWIW electronics do not care what signal you put through them; as long as it is a good preamp it will be equally good at doing intense classical as well as rock or jazz.
If you have a solid state amplifier some tube preamps may not be able to play bass properly. Some will do just fine.
I prefer tubes because it is easier to get them to sound like real music. If the preamp is not very fast I am unconvinced, but it must not be bright either. I like good bass extension, but I don't like the extra warmth that many tube preamps have in the mid bass. I want the sound to be neutral without editorializing. Deep bass seems to me the hardest thing for tube preamps to do right, but if they do that right there will be no solid state that can keep up.