If the EX600s are really that close to the EX1000s - and I should find out soon - then the EX600s would not just be a great buy, but quite possibly the best bang for the buck phones at the moment.
Today I received a CD I'd been eagerly awaiting for over two months, a live recording from 1974 - no "loudness wars" going on here, you get plenty of dynamics and not just a hammering of loud noise. With the EX1000s this double-CD sounds just incredible. I've said already that bass on these phones is simply stunning, and the words that keep springing to mind when I hear the whole sound presentation are coherence and effortlessness. Simply superb.