Need some recommendations on Tube Preamps

Thanks for the responses, great start for me to review these products. The system that was used was Vintage product dating back 40 years! Tubes is new for me and when we plugged the transistor integrated amp it was still nice sound but the tubes were better. Unfortunately many have told me that TUBE amps are not good with Planar speakers which is ideal for me since I want to keep my Bryston Amp to drive the speakers! If I had another question it would be Balance or single ended?

I want to thank all of you who responded to my query! I am greatful for the information. Most of you here would probably think I am lost in space!!! My main source is...prepare yourselves...An IPOD! Yes I know what you are thinking I am completely nuts!!! For soundstage I am completely with you on the fact that my source is mediocur however having gone through CD's and LP's years pass I find myself looking for simpler things in life and far less clutter. If i would describe me it would be "Salad bar"! I love variety and convenience. HAving to change an album or cd is such a pain. The 160gig Ipod can support over 4000 songs even at a wave file compression. Although not even close to a cd or lp the opera I listen to does have a lesser soundstage. CD reproduction is far better even with my panasonic dvd/cd player! I will look at two things first, CD source perhaps Rega Apollo and Subwoofer maybe Revel, REL or Velodyne. Later on I may invest in a Tube amp and preamp. Bryston lovers out there look out for my stuff being sold soon!!! Thanks