I listened to the GS-1000 back when it first came out 2005?... somewhere around there. Anyway, I didn't like it at all, and stuck with my hd600. Recently I have been looking for HD600 alternatives (I have the HD800) but was looking for something a little less expensive and a little more portable. Tried the Q701, loved them... then I tried the DT880, loved them too. I figured I was set, I'd keep the Q701 and the DT880 as alternatives to the HD600. Then I saw the SR325e, yeah just a few days ago... I've been off the forums for years. $300... that is a little steep, considering I got the Q701 AND the DT880 off Amazon for a little over $300 total. I really like the look of the Grados though, so I checked out the FR graphs... I always check the graphs, they usually dictate whether I will like a phone or not. Philips X2 was a perfect example, didn't like the graph, tried them anyway, hate them. Back to the Grados though. Ordered through Crutchfield, cause why pay tax on Amazon when they have the same 60 day return policy. They came today!!! Yeah Sunday!!!! UPS... weird. I plug them in and frankly, I AM BLOWN AWAY!!! Out friggin standing. Haven't heard anything that made me this happy since the HD800. $300 is a steal. They absolutely are a cut above the Beyerdynamic DT880 and the AKG Q701... and the HD600 (hate to say it, but it is true) The HD800 is a different beast, so I'm no going to compare the two.
I will skip the usual banter about how they sound. We know all the words audiophiles use to describe these things... open, bright, clear, muddy, smooth, etc... we have all heard the words before, they are in almost every review. I'll say just one thing. The Grado SR325e makes the music sound REAL... the other headphones (save for the HD800) reproduce the music quite accurately but there is something missing, it just doesn't sound as authentic as it does on the Grados. I don't know what it is, or how to describe it, but real is the only word I can use here. It is like the Q701 HD600 and the DT880 are trying to hard to do things right, but the Grados seem to just effortlessly project what is supposed to be heard. Not sure if I just got an outstanding pair, or if this is the norm. I'm honestly thinking about getting another set to put away, god forbid they change things.
Anyway, just thought I would chime in here, because they really are that great.
PS.... Bought the HD600 in 1998 or 1999, it's been a long and enjoyable affair....