Great choice on the D-20R. I auditioned that before I settled on the D-30R. One of the things that impressed me most about the D-20R was
its imaging. Easily one of the best I've heard period. Speaking of spikes..
while the stock spikes on the Proac's are pretty good when I upgraded my D-30R's to a set of Audio Points it really improved things across the board. Cleaner, tighter bass a more open mid-range and an overall improvement in smoothness.