I don't think so.. I just had another headfier that bought one of the WS55i. .He plans on using it with his iphone..The only thing the i will do for you is the integrated mic and music controls. I have never heard that feature actually making the sounds different if they do than that would make some people very angry if you think about it...I think that guy will chime in here soon after he burns his new WS55i in with his impressions of em. He was impressed I will tell you that much.. I listen to mine every day..If you have an iphone or an ipod...I know it cost a bit more to have a mic and controls on your chord but I am willing to bet you these cans will be hard to top on one.. I say go for it if you want some phone controls..With your sub woofer bass.
I will go for the standard WS55 as it is more readily available and is present in red. I'm supposing it requires minimum burn-in and an amp would be mostly superfluous right?