Upgrade to sound quality of Dynaudio Heritage speakers

Folks,

My current system consists of Ideon EOS DAC/Streamer (I haven't pulled the trigger on their Time re-clocking unit yet), Dynaudio Heritage Special stand speakers, two REL S 510 subs driven with a PASS Labs INT 25.  I'm thinking I can get more out of the Heritages if I upgrade the amp and was looking for some input for a piece of nice gear in the $10K-$12K range that would upgrade the overall sound of my system.  I like to listen to rock/jazz, etc.  My listening room is 15' x 27'. Any thoughts or suggestions?