I'm interested in what others might think is the right direction for me to go in terms of a good IEM. I have now owned or listened to a fairly wide variety of IEMs and headphones including SE215 (blue), Heir 3.Ai, Ultrasone Pro 900, Sennheiser Momentum, Panasonic HJE900, GR07, SE535 red, W4, etc.
I have sold off the Pro 900 because the treble is too harsh for me, the Momentum (for sale!) is too metallic sounding to me (though I'm not sure if that is the right way to describe it), Heir 3.Ai was a great one, but I just felt there was something left to be desired (soundstage wasn't that great) and it was a *little bit* hot on the treble for my liking, though I LOVE the way BA's handle strings. The SE535 red and almost all of Shure's products are way too mid-forward for me, and the W4, while nice, was just a little too laid back for me. I do think it'd be great for use with classical music though. I will go for something more neutral sometime in the future. For now, I'm looking more for fun.
I do love my SE215 (blue version) for its plenty deep bass response, pretty nice mids, and inoffensive treble. I'd like it if the treble wasn't rolled off up top, but other than that, I am perfectly happy with the presentation of it. I also love my Panasonic HJE-900's. They are very resolving for dynamics with good lower end, but the treble can be a little hot and fatiguing on long flights and such. Still, these are my two go-to earphones that I'll never get rid of. The only problem is that I tried out my friend's GR07 and LOVED the soundstage. I had my soundstage epiphany (never really experienced it before with IEMs) and now I can't live without it!
So... what would head-fi recommend for an IEM which can satisfy a bass-lover while retaining inoffensive, non-fatiguing, yet extended treble; appropriate mid-range; and have superb soundstage all with good resolution? I am thinking it might be interesting to try the IE8/IE80. Seems like the treble would be my main issue with those. I honestly don't know what else to look at. Help!
Perhaps you could pick up a pair of (refurbished) IE7's. It would get you the sennheiser soundstage (which is phenomenal I must admit) for a fairly low price. Also not as boomy as the 8 and treble is a little relaxed (which may solve your issue with hot trebles). Just a mere suggestion!