Why can't I quit you?
My head-fi journey started about 8 years ago, and the first headphones I really dug were the SR80, from which I eventually upgraded to the SR325e.
Since then, I've had a pair of Audeze that crapped out, Sennheisers that sounded great but somehow missed the front end of the notes (slow transients? IDK), and am now primarily using Sundara, which is outstanding. In every case, I find the replacement to be superior to the Grado overall (or else I wouldn't have bought it). After a couple of months, I think about selling the SR325e, but as soon as I plug it back in, I remember what I loved so much about it. Yeah, they can get little sibilant at times, but nothing else I've tried comes so close to the feeling of having music playing in the room around you instead of straight into your head.
After switching back to my Sundara, I find that the timbre is a little better (ie. the tone of instruments is closer to real life, which is important to me as an orchestral musician), and while slightly bright, they never get harsh as the SR325e can at times.
However, there is just something missing. They rarely give me goosebumps the way Grado's can. They don't give me the feeling of listening to live music. After a few days, I find that the sparkle just starts to feel like excessive brightness, and that the low end is a little bit lacking, so I switch back to my new acquisition and acknowledge its overall superiority. But I still can't bring myself to part with my SR325e. There is just something so special about it.
So, seriously, where can I go from here? What headphone, Grado or otherwise, can combine the timbre/tone of HD650 or Sundara, with the open quality of the SR325e? HD800? GS1000? Is it even possible?