if it weren't for the fact that RMC Audio has a policy that you cannot return headphones I would have probably returned my HFI-780's. Even though I only got them today, I don't think burn-in will help all that much if I'm using my computer w/ onboard soundcard. My DT770/80's sound great with just the AC97 onboard chip but the sound quality on the 780's going from my Sony cd player to computer really dropped. Bass impact and extension quality worsened and the highs became really harsh (as opposed to enjoyable on my cd player) when I switched to my computer. If I were using my cd player I could definitely say that the 780's were better than the DT770/80's but since I listen to my music mainly on my computer I can't. I could pick up a D2 Boa but I'm not sure what to do atm. It's too bad RMC Audio carries such a stupid return/exchange policy
