I'm looking into getting some new headphones mainly for exercising, traveling, and to listen around the dorm when my roommate's around. At first I was looking into the HD497's, but I think the open style won't be too good for when I'm traveling or in my room, when I don't want outside noise coming in and I don't want sound leaking out. What are the best closed style headphones I could get for a <$50-70 pricetag? And would a closed headphone in this pricerange have the same quality I could get with the 497s? I've mainly been looking at the HD212-pro and PX 200s (liking the compact style of the 200s), are any of these worthwhile? Thanks for any info.