the Grado SR325is headphones are an amazing set of headphones. I have'nt really had a chance to break them in yet, so they are not to their full potential yet, but so far they are amazing. The sound quality is great, and I really couldn't ask for much more than that. They have great highs, mids, and lows. You can hear the vocals crystal clear, the guitars sound crisp and are very full, and you can feel/hear every bass kick and snare hit. Overall a great set of headphones.
 
There is only one factor about these headphones that leave something to be desired and that is the comfort. They are not awful, but they can be uncomfortable for long periods of use. My left ear always seems to get sore and hurts after a little while, though my right ear is fine. Although this can be fixed if you just wear a hat or something to keep the headphones from being too tight on your ears.
 
Great set of cans nonetheless and I suggest them to anyone who is looking for great music quality while listening to jazz, rock, and especially metal!