I purchased these after having realized that I'm not a big fan of the Sennheiser soundstage. I was looking at he HD595's, but similarly to the 555's, I found them to be a little too broad of a sound for me, without picking up on detail. I heard Grado's prominent mids and respectable high's would be good for me, and I fell in love with the sound immediately. The high's at first are a bit too forward maybe before wearing them in, but they soften up with use, and the bass is subtle and punchy without being boosted or muddy (I find the bass to bleed too...