From what I understand, the SR-60i's are designed to be modded. See Bilavideo's Grado Mod Thread. They're cheap enough to where you wont feel too uncomfortable opening them up ( I still havent opened my Sr225's, not balls yet sigh).
Also, try using the Grados with Eric Clapton Uplugged or any Acoustic Album (Alice in Chains). IMO that is where they truly shine. I own a pair of AD700s also, and while more comfortable than the Grados (not by much, the grado headband is VERY bendable and necessary for comfort.), they dont quite have the detail of my 225i's.
AFAIK, the 225 and sr 60 use the same driver. Its all a matter of modding.