I just read this thread and see that you intend to go to a balanced preamp. Consider the Audio Research CD-3 or (CD-3 Mk. II). It is a truly differential-balanced design, and very "well-balanced" performer. The only warning is that it loads from the top. Here are reviews by Marc Mickelson and Wes Phillips (of Stereophile):
http://www.soundstage.com/revequip/audioresearch_cd3mkii.htm
http://www.onhifi.com/product/audioresearch_cd3.htm
I am biased because I own one, but if you want a balanced CD player and don't want to spring for Meitner-level digital gear, it is a good option.
http://www.soundstage.com/revequip/audioresearch_cd3mkii.htm
http://www.onhifi.com/product/audioresearch_cd3.htm
I am biased because I own one, but if you want a balanced CD player and don't want to spring for Meitner-level digital gear, it is a good option.