I have the 8008 amp and use a Krell KRC 2 with it. I've tried tubes and SS and like the solid state pre-amps much better. The KRC 2 is fully balanced throughout and has a great sound. It is line level and you did not mention if you need a phono section. That mey or may not make a difference. The June 1994 Stereophile has a review of the KRC 2 which you should be able to checkout on-line.
Good Luck
Good Luck