Looking for an IEM with super-real sounding guitar from the mids. Something with punchy, deep extending but quick bass punch for the kick drum (don't need huge amount of bass, just nice and deep/tight/fast), shimmering/airy treble on the cymbal strikes. I guess a kind of aggressive sound but without being shrill. Also looking for great instrument separation and soundstage because I also love my ambient/post-rock with swirling soundscapes. No idea where I should be looking in the IEM market. In full-sized cans I guess the equivalent is close to the Grado RS1, but I need more soundstage than that if possible, and hopefully a little more bass punch from the kick drums.