I have heard a lot of people saying that it need an good amp to run. Does it really need an amp? Do you think my M-Audio Fast Track can run this perfectly? I think I will just stick with my Sennheiser PX100-II when I go out with my iPod Touch. Also, I have heard people saying that SRH440 is actually more balanced and accurate than SRH840. It would be more suitable for monitoring, isn't it?
There SRH440 is the lower model, but it too should suffice. The Fast Track will power it fine.