Hey guys, I'm scheduled for Lasik surgery, which means I'm getting back into the headphone world. I used to own a pair of RS1i's which I loved, but due to the pressure, my ears pressed against the legs of my glasses and I couldn't listen to them for more than 30 minutes without experiencing severe earlobe pain. I had to end up selling the RS1i.
Now that I (hopefully) will be glasses-free, I'd like to repurchase a pair of Grados, but the landscape has changed slightly since then. Apparently Grado has come out with a new model, the PS500, which is $100 less than the RS1i. The price difference isn't a big deal to me, but the sound difference is. I mainly listen to trance, pop, and dance. My only complaint with the RS1i (aside from the comfort issue) was that, sometimes, for particularly sibilant songs, the midrange hump made those parts very shrill.
Can someone point out the advantages and disadvantages of the RS1i over the PS500? So far I've read that the PS500 has more mid-bass and slightly recessed mids compared to the RS1i, but I can't tell if that's something I'd like or not.