I had a A50 and returned it due to it just not working at all. So now i'm back looking into headphones. A couple stand out to me above 200s. I'm fine with paying that as soon as I get my return. But then I see a few that nudge over $1,500 that seem like they would be better and I would need to wait for a couple of months before I could purchase. Then there's the cost of an amplifier. As I'm told, an amp isn't an option for quality of audio. Buy an amp. Either way, I'm unsure of how much money to spend for an over-ear, open-back headphone (10+ hours of use at one sitting). I'd like to stay within $300, but quality over budget, I'll go to $500.