Hey Bill. You recently picked up the SR60i, right? I highly recommend trying the L-Cush pads on your SR60i. It's a simple pad swap, and for $20 I think it substantially improves the sound of the lower model Grados. Things to expect: slightly brighter tonality, better defined vocals, greater imaging, greater separation, greater "air", greater bass definition. It's an investment that I personally consider mandatory for the SR60i.
I've always been a strong advocate for the SR60i w/ L-Cush pads, and I'm reaffirming my advocacy today! I've missed my SR60i, so today I picked up a new pair from the local Grado retailer :) I listened for a while with the stock pads, and then switched to L-Cush and immediately re-experienced why I advocate for the L-Cush pads so strongly. I still maintain SR60i w/ L-Cush pads is the best value I have yet found in the headphone world.
If the $20 isn't a problem, try it out! Report back with your findings!