Need some pre-amp advice...

Hey there guys.

I need some pre-amp advice. I currently use a Lexicon MC-12B as my pre/pro, and frankly want to get it out of the loop for two channel processing. I need a pre-amp that will have the following:

Remote control
At least two balanced ins
Ability to drive Pass Labs X600s effectively
and the biggie *** must have *balanced* processor bypass.

That last one is a biggie -- there are not too many preamps that I have found that offer that. Ones that I am considering are:

Krell KCT
Pass X0/X0.2
Sonic Frontiers Line 3
BAT 31SE/51SE
Levinson 320S

I am not opposed to buying used -- my budget is ~6000. Could go lower, could go a little bit higher.

Speakers are Dynaudio Confidence 2, source is Wadia 861b.

I am not opposed to tubes, but there would have to be a compelling reason for them (no experience at all with them)

Thanks,

Blake