nice review tadad1, was deciding on purchasing a new set of earphones when i came across these 'ibuds' or 'earbuds', whatever they are called, here's a picture

They should fit nicely on any conventional earphones.
i was thinking whether are the EarThumps and CX300 you have, produce the good sound quality because of the silicon covers? Which looks similar to the 'ibuds' above. And what if you used the CX300 without the covers?
Guess i'll probably purchase the 'ibuds' (costs about $6 for 3 pairs S,M,L) and see if it does any difference to the music.