Hey guys! Been awhile, but I was a die hard GR07 fan for a long time. Just wanted to share what happened to me. The rt channel went out in the second pair I've had within a year, so when I sent them back under warrantee to Lendmeurears for replacement, I picked up my RE262's once again. Totally fell in love with their sound, and when I got my new pair of GR07 MKII's I couldn 't listen to them. The seemed very sibilant(even after 200hrs burnin), and too bright and Vshaped, meaning exaggarated bass. So back to the RE262's then got the sony mdr 7550's for $170 off ebay and fell in love with their neutral, not bright or Vshaped sound. If the GR07 are considered a warm neutral IEM, then the 7550s are a huge step up as a more natural, warm, non-V shaped neutral sound, and for $20 to $30 more than the GR07 its a bargain. Drawbacks of the 7550 include a poorer seal, you can hear whats going on around you, wind noise and they are heavier and bulkier, but SQ wise they are a definate step up, IMHO.