Samuel777- Your SE846's are fairly bass-centric/warm with a solid bottom, lush mids and rolled-off trebles. You don't say what inserts you are using, but that is pretty much what they are. I had a pair, and eventually upgraded to JH Angies and Ultimate Ears Reference Monitors, both of which were definite improvements for about that $1K price point (though I added a custom Moon Audio cable for the Angies). There are all sorts of IEMs you could get, either customs or universals. Ultimate Ears has very nice IEMs at fairly reasonable prices which may give you what you want. I use their UERMs with my AK240SS and am quite pleased with them. UE currently is selling UERRs and UE18 Pros that are getting good reviews. Jerry Harvey has a large line of IEMs, someone here likes the Layla with the SP1000. Empire Ears might be worth looking into. You also might want to look at "Twisters" reviews on Head-Fi for more info on a wide range of devices. There are many IEMs at higher and higher price points, but what someone else recommends might not be what your personal sound signature is. By all means try them out before buying if at all possible.