Tube amps for Horn speakers.......

Hello to all that read this and try to help me. I come to this website everyday and see whats going on but am afraid to ask questions as for I am a so called "newbie" in the audio world.
I have a pair of Klipsch Klf-30's that are bi-amped with a Adcom GFA 55511(for the bottom) and a B&K ST2140 for the top. The Adcom I think is slowly dying, but thats ok since I havent done anything to it in 12 years. I would like to do an all tube system but dont know what to get that would still give me the volume and power that I am used to.
Could a lower powered tube amp be used for the top and a maybe say a pair of mono's for the bottom work?

Would like to do this without spending an arm an a leg if at all possible.

Anthem Pre1
Onkyo cd player
Signal interconnects
Cardas Quadlink 5c speaker cable

Any thoughts or ideas are more than welcomed and thank you in advance

RILEY804