Has anyone tried these.  they look a lot like the Panasonic HTF660 which are highly regarded here.  The ht260 are one the few headphones available here that appear descent.  Has anyone heard these?

I have a headroom little( original) but an thinking of getting the Nuforce icon mobile.  what is the diffence in sound quality with Senn 515's.  Am i going to see an improvement ??

Let me start by saying i am new to great sounding headphones.   My question is this i have a pair of Senn 428's and i found the frequency curve chart for them.  They have a couple of dips and a hump in the mid base.  If i use a parametric eq and compensate accordingly in those areas how much...