My PS500s came today. WOW.
I'm only a month into my hifi journal and I've heard the sr60i, MS1i, sr225i and now the PS500.
I fell in love with my sr60is and have prefered them over both the Fidelio X1s and the Beyerdynamic dt880s. I've given in - I guess I'm a Gradophile for now.
As much as I've enjoyed my sr60is, I have to say - these PS500s are on a different level. Price-wise, I guess they should be, but I wasn't expecting the jump in quality. These headphone are much more serious to me. I'm blown away.
Based on my shortly exposure to hifi, I probably don't have any credibility to recommend these, but even so - I highly recommend these :) I'd love to talk specifics if anybody is curious.