Cons: price if you don't know where to look
These are my favorite "Grados". With flats the bass is incredible. The midrange is so lifelike you are taken to the front stage of a concert. I've tried a lot of headphones and these are what I always go to and the price is reasonable. Mine are the i (latest improved) version. I highly recommend these to anyone with a Solid State, Hybrid, or OPT Tube amp.