Upgrade for Proac D2

I am interested in selling my beloved D2s and upgrading to something on the next level. I love the sound of these babies but am looking for the next level up in the $6k range. Looking for something dynamic that will stay with the magical Proac sound with increased resolution and refinement. Should I simply upgrade to the next Proac model? Any thoughts? I am using a Krell 2250 amp, Esoteric X03 CD player, AR LS25 preamp.
I would be interested in your D2's, if you decide to sell and if they are in rosewood finish. Keep me posted.