Hi Swen, can you please write some notes on the pre amp compares?
Well, to be honest the preamp comparison has only been a side show for me, being completey overshadowed by the analogue gear. Let me put it this way: the Einstein was an older model and did very, very well for the money one has to pay for it on the second hand market. The Ayre KX-R didn't impress me at all and I'm still wondering what kind of setup would be needed to make this preamp a good match. And as for the BAT and the Thöress: well, I would see them on a similar level with slightly different strengths so this is not 'better' or 'worse' but instead a question of careful system matching and personal preference.
...on top I must admit that I have a very big soft spot for the looks of the Thöress and do not really like the industrial design of the BAT. So that alone would sort it out for me.