I have the ERS which I use with the rig in my signature. Been looking not necessarily for an upgrade just something with a little different sound, perhaps a tad more bass and a little more overall warmth. Tried the triple.fi 10's and just found the sound too muddled, also have the victor fx500's which are great for the price but a little too boomy for my liking but at the price a bargain I feel. I also had the Senn ie8'S but found them a little too muddled in sound as well.
So now, after reading a lot of reviews and thoughts I have ordered a set of Final Audio Design Heaven S's in the hope that they will give me the bass I am looking for but not at the expense of the clarity I like. I will see, some recommended the c or a models but after reflection I think the S's may be more to my liking. I will let you know when I get them, they are back ordered at the moment but hopefully the wait won't be too long!