DrueThe wait is a pain however it will be well worth it. Consider it an early Christmas present to yourself. Be sure to give them ample time to settle in, they get better with age. Also be sure to amp them properly, you'll be rewarded.
DrueOTL amps such as the Bottle Head Crack seem to be popular with many enthusiasts on Head-fi.org. I have 3 amps (Schiit Jotunheim, Lake People G109S and Project Ember). Both my HD650 & HD6XX sound excellent with all of them (the Dekoni ear pads sound excellent with my SS amps but a bit too thick on the Ember so I use the HD6XX with standard ear pads with it).