Help w/ earbuds - Shure E5C vs others

[Munkster]

HI, I am interested in purchasing a pair of earphones for under $500. I'll be using this for listening on the ipod on the go mostly - that's why I narrowed it down to earbuds only.

Have anyone owned or tried the Shure E5C's? How do they compare to older versions? Any other brand/series suggestions?

Thanks in advance,
f