Shure SE215 Uni Purple

Currently use mine in the rehearsal space and it blocks out the drums very well, just enough so i can still hear them. A little bit of trouble setting them up, that might be all IEMs but not sure since i havent tried others, and the left piece has a tendency to wiggle out of my ear but i might just have to change it to a different size

The sound changes considerably depending on use of the foam vs silicon tips. Foam offers more isolation, but worse sound. Silicon offers less isolation, but better sound. Getting a good fit on the over-ear part of the cable seems difficult too, but probably just needs time to bend into shape. Otherwise a solid investment!

I use this one on my gigs and the quality is amazing

I use these with acoustic drums and there is great sound isolation. Sound quality seems fine also.