Sorry, I guess I didn't put it very well. I just wanted to know which would be the next improvement over the rs-50's, not the best IEM's I could possibly get. Can't afford to buy 1000 euro headphones, I would like to spend 300 euro (or less), but can stretch it up to 480 if improvements...

Hello Joker, thanks to your magnificent list I ended up buying a pair of rs-50's and vc-1000's, which I both quite enjoyed (especially the rs-50).   Now I wondered which would be the next logical step up, just in terms of sound quality, from the RockIt Sounds. My preferences are neutrality...