Suggestions for a tube preamp


I am looking for a tube preamp that will work well with my system:

Clayton S 40 ampliflier
Rick Reimer Wind River GS speakers (on order)
Heavily modified Pioneer DVD player

I do not need phono and do not want to spend more than $1000.00 used.

Here are some preamps I have looked at:

AR LS 7, LS2, LS1
Blue Circle BC 21
Sonic Frontiers Line 1
MFA MAGUS
Audible Illusions L1 or Mod 3
CJ PV 10
Counterpoint 2000, 3000

Any and all suggestions will be appreciated!
hiflyer
Hi Guys and Gals,

I have narrowed the search down to Sonic Frontiers, EAR and Audible Illusions in the used 700.00 price range. Any other thoughts or ideas?
ARC LS-7 is a nice line stage in your price range. Just 1 tube to play with and tweek till your hearts content. It's a "better" SFL-1 IMO. and Im not a big AI fan. ARC always seemed just a little bit better to my ears!

Cheers!
After posting this thread,I realized that the LS-7 actually has 4 tubes, not 1. Still a better sonic deal than most other pre amps, especially at the prices being listed of late!