Just wanted to update since early I expressed my dissatisfaction with these headphones.
I did have this kind of experience too. I was about to sell my K701, and I changed my mind. What's the problem? I did not have an amp to make it shine. Now, I believe that K701 is that good if and only if an amp of high quality is its side. My advice: Buy K701 if you a high quality amp! I think this is also true with higher end headphones like HD800, LCD 2 and T1!
Welcome to Headfi. Sorry about your wallet!
I only mentioned this statement this time but when I have Grado SR60, I was not a believer of it.