As I mentioned several comments back, I have owned several Grado over the years. My first one was an RS1 that I got in the late 90s, and was my only headphone for many years. As a classical and jazz fan first and foremost, they worked awesomely. I just sold them because they sold for ridiculous money among Grado fans - I learned that Grado collectionists pay $$$ for certain models, so why not
... Note that I had to glue the RS1s together once or twice, the screw attaching an earcup did fall out, but it was quick and easy.
I had also bought SR225e for the office. I think I lucked out with them. When I tried to upgrade to SR325e, the ones I got sounded worse, or at the very least were much harder to drive, sounding much lower in volume, which specs in hand should have never been the case. They went back, and that made me suspicious of Grado's quality control. I also bought PS500 at some point in time, but a friend "borrowed" them, they got stolen when his car was broken into (he did compensate me :-D).
But I remain a huge fan of my SR225e - they sound great and are super-easy to drive. I will not sell them. I am happy rotating between the SR225e, Shure SRH1540 and Beyerdynamic DT1990.