Alright... Here's my issue. My Sennheiser 598s are great for at home listening, but they are not the greatest thing to carry around campus. I'd like something more fit for hard rock and metal this time around as well as a different sound signature. (I'm curious...) So far I've narrowed my choices down to the Grado SR60i, and the Grado SR80i. I remember the older pre-"i" had different pads, but I think that's changed to both having the "comfies." My question is if the sr80s are worth the extra dollars over the 60. Not too sure if I will be modding in the future, but I do want to keep my options open. Side note: I don't really care if they leak sound. Those iPod ear buds leak sound like an open headphone anyway, so I'm really concerned about disturbing people. Also should I consider getting a portable amp to power these, or will they no really benefit much from one?