Those Shures are probably as good as any in that price range.
Before I had my Senn 555s I had a pair of Senn HD485s -- doesnt look like they make them anymore -- but one of the features it had was great.
Single sided cable that was detachable -- so if the cable ever got mucked you just replaced it -- and it was 10ft long
looks like the HD485 were replaced with the HD428/438s: http://www.sennheiserusa.com/private_headphones_closed-stereo-headphones_502765
And you still want to look at some Sony V6 or 7605s. Do you have a Guitar Center near you? They often have a decent selection and you can try them on...
I was looking at a pair of the more expensive ($99) Shures that have the detachable side cord. I like the look, they got excellent reviews, and only double my target price.
I'll look at the Sony's you recommend.