Hey guys. After spending too many hours searching for answers at Head-Fi and getting nowhere, I found HeadCase. Seems like the people here generally have more knowledge about headphones than Head-Fi, but thats just how it looks to me. On to the point, I hope you guys can come up with a better headphone or selection of headphones than what I've currently come up with.
First off, about 3 or 4 years ago, I took my first real step into higher quality headphones by buying a Sony MDR-7506. Up to this point, they were great, easily driven, fairly clear sound quality, and they were miles ahead of what I've used in the past, and I preferred them to the Shure E3 IEMs that I would occasionally listen to. Now as I start to notice the things that bother me, such as the earpads seams tearing, the headphones getting a bit hot, and the sound quality that I find a bit unsatisfying, nothing bothers me more than the response. The mids seem to overpower the bass, and the trebles are a bit harsh and together with the mids, just completely wash out the bass. It makes it hard to hear the bass line at all in a song, you really have to search for it. It gets pretty tiring after a while, and sometimes I can barely go 30 minutes without the treble just hurting my ears. They do everything ok, but no better. The depth of the instruments is pretty good, the clarity, and detail aren't bad either, but I'm just looking for more. Bass impact isn't completely absent, but isn't noticeable until you get the right song at a high enough volume, and is lacking. The bass does feel fairly tight, and the tightness is definitely is a redeeming factor.
Rather than giving a review of my headphones, I should just say what I'm looking for in an upgrade from these MDR-7506s.
Moderate amount of bass impact, along with a tight, detailed bass Treble not to be harsh, harshness is discomforting and sounds bad Treble/mids to not overpower the bass, maybe even for it to be slightly on the darker side. Better detail/less muddiness, basically so that you can hear each part of the music easily and it doesn't sound all smeared together.
Pretty much a headphone with these characteristics, and that will sound like a clear upgrade from the 7506s. I don't want to "upgrade" to a similar quality headphone with a different sound signature.
The source (at best) would be FLACs or 320 kbps MP3s running through foobar2000's ASIO output, to an Asus Xonar Essence ST headphone amp, then the headphones. I've also got a bunch of speaker amps and receivers, but the Essence ST sounds the best overall. The music preference is mostly rock, but some trance, house, and hip-hop.
The absolute budget max is $350, I don't want to spend too much on these. From what I've gathered, the Shure SRH840s, AKG K701/K702, and HD600s seem to be the best in that price range. I know they're not all in the same category, but just what I've been able to come up with. This is by no means a decision between these three, just some ideas. Feedback on these as well as other suggestions are completely welcome. I hope you guys can help.
Thanks, a lot.