You might also consider the Sennheiser HD202. They are supraaural (on-the-ear) closed headphones. They probably won't give you the most isolation, but Sennheiser has voiced their new cheap models to sound similar to your Grado's. And the HD202 is only $30. And the review that exists on them is positive, their only fault is a limited extreme top end, which is noticable, but not severe, and by the sounds of it was not any worse than the flaws of the other suggested headphones. You'll have to search for them, though. It seems that the cheap Sennheisers are not being promoted well by Sennheiser, or commonly found. And as another route you could take, if you can live with another open-air headphone, Sennheiser's HD477 can be found for $25 at Circuit City, a true bargain since they sound very similar to their upgrade the HD497, which has caused a debate on Head-Fi because they sound arguably better than the SR-60 and SR-80 and cost $60-70. And the HD477 is a medium-sized circumaural headphone, it's ugly (not as ugly as the 497), and has velour earpads (the 497 uses CHEAP pleather). It's normal list is $59.99, the 497's is $69.99. But Circuit City is selling it at $25. I don't get it either. But remember if you go with any cheap Sennheiser, give it a good 40 hour break-in before you decide on it's sound quality. They sound horrible in the beginning, but I know my 497 ended up sounding like a hybrid between a Grado SR-125 and a Sennheiser HD-570, both $150 headphones. I have had only one person reply that he thought the 497 was worse than the SR-80, and he just auditioned them, he hadn't owned them himself. The reason why I like them is because, like the SR-125 vs. the SR-80 the sound is much clearer, without the veiled treble. The HD477 doesn't have as much detail in the treble as the 497, and it's bass extension is only to 37 Hz, while the 497 goes down to 22 Hz. But for $25, it is your best deal for a portable headphone. It should be noted that while the 497 is great with all kinds of music, the 477 is best suited for only rock and pop, it just doesn't have the extremely detailed treble or lowest octave bass required for other genres of music. It should be noted that though I have researched all of these headphones to make my opinion, I have owned only the SR-80 and the HD497. I have listened to the SR-125 and the HD-570. My opinions on the 477 and the 202 are based on reviews. The 202 is closed, the 477 is open. My guess is that the 477 would sound better, since there were more flaws stated in the review on the 202 than the reviews of the 477.
