Greetings everyone. Audiogon has a known software bug which did not allow me to respond. The support desk just gave me a work around, so I hope this reply shows up.
I am looking in the $500-1000 dollar range as this system is for background music, not critical listening, and the rest of the system is mid fi quality at best. Wanted to use a tube pre amp to smooth out compressed, digital music which is streamed from various sources and to add some warmth to the system. Provide clarity so you can easily talk over the music. Perhaps I should look at kits. I am surprised a simple pre amp as I have described, with just one or two relatively inexpensive tubes needs to cost so much $$. I guess tube gear are a niche market and just cost more. Thank you very much for all of your replies, but just about all of them were targeted to a pretty good stereo system, not a multi zone background music system.