I'm about to pull the trigger for some 650's on Amazon and I was wondering if it was worth getting the refurb'ed ones and saving $100 or should I just go ahead and get the new ones?   New is $400 and refurb is $300

I've been lurking these forums for a while and currently have Ultrasone 580's as they seemed like a good set of beginner headphones. I've enjoyed them quite a lot but want to take my next step in my audiophile journey.   I listen to pretty much everything so I want a well balanced set of...