No problem in that.
I was in the same shoes as you but I couldn't afford a HE500 (still can't), so it was lucky I got the opportunity to get one for cheap. But even then the sound did not achieve "religious experience" level, not until I've done extensive modding (on the grills / earpads). Nowadays though everything finally sounds right.
All that's really left is for me to save up and get proper gear to drive the HE500s and unleash its soundstage/dynamics, and then it'd be religious experience 24/7 instead of just sprinkles of it.
What Amp are you using now jerg?