Senn MX500 vs 550

[cordsp]

I think I'm going to purchase either the sennheiser MX500 or 550 for my iPod....are there any major differences between these 2 models? I can't seem to decide which one I should be getting....any help!

 

[TURBO]

I do have some 550 some where. I can sell it to you. Pm me if interested. I dont use it. Thanks.

 

[fr4c]

this might help:
http://www6.head-fi.org/forums/showt...ht=mx500+mx550