you only really need the amp if your gonna be using them from a portable cd player or the like. they pretty much suck without an amp for portable use.

I went ahead and ordered a pair from headphone.com I figure if I don't like em I can always return em.

would you say that the er-6 have better sound quality than the Grado SR-60? I have a pair of Sennheiser 495s, and the left earpiece quit working. Since my cd player sucks at driving them anyway, im going to replace them with something else instead of having them repaired. I have listened to...