I think I came to the right place, I heard this is where all the knowledgeable audio heads are. I just got a Creative Muvo Micro 512 MP3 player, and I'm looking to upgrade the earbuds. Just a note, I only wear earbuds!! I've narrowed it down to pretty much two choices. It's between the Sennheiser MX 500's and the Sennheiser MX550's. I've read a lot of great reviews on the MX500's, but haven't come across any material reviewing the MX550's.?! What pair do all of you audio Gurus think is better and why???!!! Thanks everyone, Derek...

I like my MX450s a lot more than my MX500s. I recommend the MX450 or 550. Don't even ask me for a review ;P