Ugh, it's like pulling teeth to convince people how great, and/or how worth the investment, in-ears are. I just have the UM Pro 10's, and I've been very happy with them, particularly for single drivers and $150. With the right foam ear piece on them, there is no fit issue (mine have never come out, and I sweat and move a fair amount), and I have everything I need in my ear. I am the primary backing vocals in my band, and our guitarists frequently play direct with no amps, so I need a little of everything in my monitors. I would like to eventually step up to a custom mold, dual driver, but I am in no hurry at this point. I was going through a Behringer P1, but recently went wireless with one of the new Shure PSM 300 systems. It's a little overkill to have a wireless in-ear system playing drums (it's also the new "most expensive" thing I carry), but the freedom to get up as needed is wonderful. I also play guitar and some other instruments, so I'm prepared ahead, should I ever need the ability.