Summary: Initial impressions of these was a bit ho hum, but in reflection that is where these headphones really shine. No matter what you throw at them they will retain an air of dignity and restraint, and they would never do anything so vulgar as to shout in ones ear.
Summary: 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.
Summary: Edited in October 2015:
After 3 weeks waiting, I finally recieved my third pair of mspro. I paid eye-watering 1200 AUD for this new old stock i version. FYI, the RRP of Byer T1 in Australia is AUD1050 and 1300 dollars for HD800. Am I crazy? After I state my opionon, You'll be the judge.