It's weird, everybody always say that the gold have more bass, but really, to my ears, they both sound within 5% of each other's bass output, it's not like night and day. Most of the times, I prefer the coppers, I usually just let my friends borrow the golds.
So really, just get the coppers, refined in every-way. But if you're short on cash, get the golds, in my opinion, the slightly more clarity isn't worth the extra $70 difference at onecall.com

























Though the Coppers would have more treble and clarity than the DDM's going from memory. 