Eh, I wouldn't go so far as to say the SR60 is overrated. They're damn good at the price point for most people. The problem is that the higher up you go (barring the PS/GS line), you're just getting incremental improvements that get harder to justify unless you really like the sound signature because nothing else really sounds like a Grado.
Having heard SR80is, I really hate their sound signature to the point that I'd almost rather listen to Apple earbuds. They'd probably be more comfortable, too. The incremental upgrades don't annoy me, and you could probably mod Grado headphones into something far better than they actually are. But stock Grados? Terrible. I can't wear the higher-end models for more than a few seconds no matter how they're positioned on my head and I can't even stand listening to the low-end, no-bass models.
How people can wear a Grado headphone is beyond me. What gets me even more is how Grado can make such incredibly uncomfortable headphones and everyone just keeps buying them. Apparently I'm not the target audience because there are many people who enjoy them and I'm not about to tell them their opinion is wrong.