If you liked the planar sound. Then I would look for speakers with Air Motion Transducers (AMT or Heil). They are kind of like folded Maggies for the high and mid frequencies. This will help you through, by giving you the liquid mids and high of the ribbon speakers. You can just google speakers with Air Motion Transducers.
If you want to move on from planar. I did. I realize as great a sound as planar gave, I wanted a more natural and musical sound. Your electronics are well set up for that. I prefer Sonus Faber (you like listening to the music and not your system)... they have many different stand mounted models. If you want more precise and a bit more audiophile sounding (you like listening to your system a bit more) then DynAudio. If you want a bit more happy, punchy, fun to listen to sound ( a bit less audiophile), have a look at Totem.