Summary: I've own/owned every single pair of Grados except the PS1000's. In general, they're great. But the only ones to disappoint are the iGrados (which were a joke), and the SR125.
If you look at the freq.
Pros: Relatively cheap, comfortable pads.
Cons: Strong dip in the midrange frequencies, the SR80i sounds better for less.
Summary: Good sounding phone. Bass is controlled, somewhat light, and in no way overpowering. Highs are tamed a bit over the lower models and detail is brought out more.
The 8 Cond "i-Cable" is a little bulky, but the advantage it gives these over the SR80i is worth it.
Summary: These headphones are quite good, and have really great highs. They are an improvement over the SR-80i, with a more balanced and bright sound with better articulation. For the money, they are quite good.
These headphones do need to be broken in a bit.
Pros: Very good mids and highs, crisp bass, good articulation, no distortion
Summary: These babies can sing. That's all I can say. I had never tried a pair of Grados before these and I'm pretty shocked (in a good way.)
The box leaves some to be desired, a pizza-box style box, with an image of a pair of Grado woodies on it.
Pros: Sound quality, Surprisingly good build quality, works unamped and shines even brighter with.
Summary: I LOVE listening to music on these cans! However, I can only do so when home alone it seems. As with all open phones they can produce quite a bit of sound outside of your ear. Music has a wonderful punch and brightness when heard through these, and they are very easy to drive without a headphone...
Pros: Great Lively Sound, Made in USA, Quality Construction, Easy to Drive
Cons: Bad for and office environment, can get quite uncomfortable after a while