Interesting.  You'd say the 598's have less bass than the Grado's?  I agree with the slower attack compared to the SR60's I heard, but it was also months between hearing both for me.

I'm interested in this comparison too and there are several other threads on this forum answering the same question.  I have not read them yet, but here's what I know.  I listened to the 598's a few months ago and really liked them.  They were fun to listen to, a little on the warm side and...