Tidal Piano Diacera and Tidal Contriva Diacera define quite well the lower and upper end of your price bracket in Germany (at present exchange rates). Since you live in Germany, do yourself the favour of a visit in Hürth or Kronberg (at Transparent Acoustic) or organize an audition in your system straight away.
For information - even if I can feel the next sneer coming my way - the very first Tidal review in a German magazine has just been published on the Piano Diacera in Hifi & Records 1/2011. The remarkable thing about this? Leaf through the magazine: not one cent for advertising had to change hands.