I've owned the SR60 and SR80/I both many years ago and just last year. Most recently I owned the Beyer DT880 pro 250 ohm. While I think the Grado is an amazing value for the price, very clear and dynamic, listening to the Beyers confirmed some feelings I had about these Grados. Listening to the SR80 makes me think of a mini-monitor with a metal dome; a bit overly forward and peaky up top with a midbass hump after which the bass falls off a cliff. In comparison the DT880 was like a full size floorstanding speaker with a silk dome tweeter. Very smooth but still detailed and dynamic without the midbass hump and extending much lower with a more gradual rolloff. Do the higher end Grados retain a similar signature to the lower end? SR325 or PS500? I found the Beyer vastly superior to the SR80 in every way. Just curious.