I just bought a 325i recently.
Done a lot of research on the review of few headphones, including Senn 600, 650, AKG 601, 701, and of course Grados' 325i, RS-1 and GS 1000.
After reading those reviews here, didnt even think that i'l ever get the 325i. More towards 701 that time.
So i went to my local headphones store, tried out all hte models i mentioned above. Oh man, i was in love with Grado sound signature especially RS-1 and 325i
Senns and AKGs were totally out of my list. I am not saying they are not good, in fact they are very good headphones, but its just not up to my taste
On the other hand, Grado really makes all my musics "come alive"
It was so involving that i felt i was part of the songs !
Of all Grado, I like the RS-1 the most. But too expensive for me
So i got the 325i instead. 325i is really good for the price and i am gonna get it recabled soon. I didnt find 325i is too "bright", but no doubt that it is the brightest out of those models i mentioned above. But it is the brightness that i was in love with, the vocal is so clear, alive, that it makes the others sound a bit dull. So finally i got 325i.
Conclusion :
Those are all really good headphones, but each of them focus on different things. So its really up to your taste that which headphones suits you. And you'l never know untill you try them