Overall, I like these headphones a lot, and they provide great bang for the buck compared to other headphones I listened to in this price range.
See here for complete review:
http://www.head-fi.org/t/618598/sennheiser-hd558-hd430-comparison
See here for complete review:
http://www.head-fi.org/t/618598/sennheiser-hd558-hd430-comparison