I stumbled upon this forum a year or so ago and thus began my initiation into the headphone world. I have mostly purchased headphones in the "budget" king killer type posts that were on the cheaper side. I own the Samson 850's, the monoprice cheapies, Panasonic htf600's, Brainwavz HM3. My favorite pair of headphones that I've ever owned was the Sennheiser Px-100's and am going to buy the newer version of those since my old pair went kaput. I've been lurking in the JVC HA-S500 thread and from what I've read they sound like something that would be interesting to at least add to my budget collection as well. Anyway, I'm wanting to step up a bit in the headphone world and acquire some new headphones. I'm wanting to spend under 300. They have to be amazing for mostly rock music, but I would love for them to play other music at least decently because I listen to a bit of everything. I am also looking for something very comfortable as well. As far as amping, I got a E17 for Christmas, but I don't know if that will have enough punch for what I am asking for. Any suggestions would be greatly appreciated.