Solid State or Tube Preamp mated with Tube Monos?


Just wanted your opinions on partnering "tube monoblocks with a solid state preamp" versus "tube monoblocks with a tube preamp." We currently use Wolcott Tube Monoblocks with a beautiful sounding Threshold Stasis R5 preamp; however, I just want to get a sense of the possibilities -- good and bad -- transitioning to a tube preamp mated with the Wolcott monos. Thank you.
somut
Thanks for the informative responses gentlemen. It's a privilege to be amongst a community of human beings in touch with not merely cutting-edge audio engineering but more significantly with cutting-edge science.
"Moreover, the sound of the pieces together seem to approach perfection to a closer degree than other tube and solid state setups we've had."

That's what it's all about. Be careful when you are this close. However, if you are thinking of a change, are you wanting a sharper sound or a softer sound?
At this point, I prefer to err on the side of caution and not mess with success, i.e. "Be careful when you are this close."

Like a gentleman advised me about putting on too many layers of spar varnish, "Two or three layers is fine; but, when you start putting on more than that, things are gonna start moving on you (likely for the worse) . . .."