I wanted to ask the same question to ClieOS...
What might you recommend, along the lines of the GR07 being my favourite, as a sidegrade comparable to it? I'm thinking something a little more edgy with a touch more presence in the treble. The GR07 really are perfect for me, just wondering what you might have to say. I definitely do not like recessed mids!
The headphones I own are listed in my signature
The only IEM that makes sense for me as an GR07 upgrade is K2 SP, but unfortunately it is not available to the international buyer anymore. The two other alternative to GR07 are TDK BA200 and Westone 2. BA200 is actually slightly warmer than GR07 with equally smooth treble while W2 is more analytical and neutral, so they are not exactly GR07 + treble.