The technical specifications of the Boesendorfer SE sound good enough.
What about the music?  Try listening to the CD, "Dick Hyman plays Fats
Waller", recorded on the Bosendorfer.  WOW. Try that on your Duo-Art,
Welte, Ampico etc.

 [ I think the old pneumatic instruments could do very well with Hyman,
 [ Spencer, but 'twould require lots of editing labour.  I hope to cut
 [ a roll of "Willow Tree", as played by Hyman.  Of course, the roll
 [ should then be played on a pneumatic 97-key Boesendorfer!  -- Robbie