I'm not up to speed on what's available in Germany,buy I highly recommend that whatever you go with, you spend the $$$ on TRIPLE driver IEM's, or at least DUAL drivers at a minimum.
DO NOT GO CHEAP on your IEM's and
AVOID single-driver buds.. you'll hate both choices if you do and blame the IEM's.
I've seen it happen numerous times.. both in person, and on forums like TB.
Why TRIPLE over single drivers?
Think about a PA system. Imagine how it would sound to the audience if you put kick, snare, hat, toms, guitars, 3 vocals, keys (and everything else) thru a single speaker !!
It would sound like CR*P !! NO separation, no definition and it will all turn to garbled-mush pretty quickly.
Why would you want to put that right next to your ears ???????
That's what you get with single-drivers.
TRIPLE drivers will let you [selectively] boost/cut each frequency range, bump the lows, give you FAR better low-end clarity, definition and separation. The same for the mids and highs - just like it would on a PA system.
Customs molds are obviously going to be more expensive than universals, but generally give you better isolation and do not break the seal when you open your mouth or sing.
Westone's have VERY high ratings for universals - UM-30, AM-30 and W-30. I am not affiliated w/ Westone BTW.
Take a look at what else is out there in the market.. it will give you an idea of the kind of budget you will need.
If you can't afford decent triple driver universal IEM's.. save the money for them!!
Cheap IEM's will work.. but you'll get more distortion and ear fatigue far faster than good buds, and you'll end up upgrading them anyway. Buy once, cry once.
I'm saying this.. because over the last 7 yrs - I've been there, done that.. got the complete T-shirt collection.