I upgraded from the SR80s to these and they blew my mind. They made my SR80s sound like a muddy mess. Like has been said many times, though, you should go listen to them first.
You may also want to look into the DT880s. Both of these headphones have made my Grado ears happy, but they offer slightly different things. I use my 940s for portable use now since they fold up well and offer decent sound isolation. The DT880s are my go-to at home.