You can buy in-ears and have your local audiologist make custom earmolds for your in ears. This is the best isolation. You will have the best mix as well. Since YOU control the volume that you hear with in ears, you get to determine how you want it to be. You can by your own mini mixers for in ears that gives you control over the mix you recieve as well. Lot's of options- try 'em you'll like them.

We've had a thread on this very subject before. Lot's of opinions, but I like them. Ear damage? I don't buy that theory at all, because you as the user have the ultimate control over the db level you hear. Hope this helps-

Dave

in-ears have me intrigued.  i don't really play much in places where i need a monitor, but when i have we've used wedge monitors, which i wasn't particularly enamored of.  i don't really play loud music anymore, so chances are, i'll never need them.  

HAR... cabbage (I have potatoes), in your ears- he he he I get it.

I just got a new pair of "Future Sonics" EM3 IEM's and they have drastically improved on my system! The Koss fix looks cool and I may try THAT should anything falter with my new ear buds. But the Future Sonics list for just $99. A bit more than the Koss, but no modifications are needed! They sound great right out of the box!

Ademdem;
Afetr rehearsal last night, I have to say the Future Sonic EM3's rool like ozzy! Geez what a difference! I'm lovin it!