Using Sennheiser HD-555's around here. I bought mine for about $55 "refurb" through Amazon. I didn't get a retail box but they were literally brand new; a small scratch was the only flaw, but even the cord was never unwrapped. They sound fantastic with proper amplification and half-decent through lower-quality sources. I'd, personally, never spend more than $500 on one pair of headphones, especially when fantastic cans like AKG K701/K702's go for $250. That said, why not something like Koss PortaPro's? They're not the most durable headphones, but they're basically top audio quality for $30. Koss's warranty is fantastic and has been for 25 years now; if your headphones break, toss them in an envelope/small box and Koss will replace them for US$6. So even if you end up sitting on them, they'll replace them for the price of cheap Wal-Mart headphones.