Well I was listening to my new 325is tonight and I am still not totally sold on the sound, even though they are quite a bit better than when I first got them. I think I want to try some G-Cush pads on them though before I quit, some people say it makes a pretty big change (for the better).
On another note and topic really. I noticed something earlier tonight. I was listening to my 325's and the particular track had some backup singers that came in on the chorus. At that time I was comparing the 325's with my Sennheiser HD580's and I don't know what the term for this is, imaging, transparency, or what. With the Grado I could hear the backup singers and I could tell that at least 1 of them was a woman, but that was it. Listening with the Senns I could tell there were 3 backup singers and they were all 3 women. I don't know what gives one headphone the ability to pick up, what I would call, micro-detail and another not. I was kind of taken back by that because in all other respects I was liking the Grados more.
I really disliked the SR325is headphones. I thought I was "upgrading" from the SR225i's but boy was I wrong. The treble just left my ears ringing. I couldn't live with them so I used that as motivation to pick up the RS1s. YMMV of course.