I don’t know if the preamp is a real balanced one. The phono stage certainly isn’t. I didn’t know the MSB has an output option. I have set it to high and it’s better. Still the sound is more compressed vs Vitus.Preamp & Power Amp matching is sometimes a mystery... I had an Aries Cerat Incito-S which has never been accepted by my TAD Power Amp. The C1000 preamp is certainly excellent but if you can have a very good price for a C2500 I would not hesitate (you can even try its internal DAC with your MSB discrete)
I don't know if you are using XLR connections but the main issue that I have met with TAD is when other gears are using pseudo balanced outputs... TAD design is fully balanced and fully isolated from home ground (earth pin in the IEC inlet is missing).
You think the C2000 is a better machine than the newer C1000? They say the C1000 share more elements with the reference C600. Of course I’m tempted by the C2000 demo since it would be cheaper than the C1000 brand new.