I'm not entirely sure what you are asking for. The Powerbeats 3 are on ear, and that's what your thread title is asking for. Did you in fact want in-ear?
I was never much of a Bose fan, but I've been very pleasantly surprised by my QC20's. I've not tried to take them running but I suspect they would be OK. There's always Etymotic and you can get custom fitted inserts. For something a little different, try Phiaton (MS100BA).
In-ear sound is very subjective. What sort of sound are you looking for? Balanced, bass rockers, classical, ???