Etymotics Vs Shure High End Headphones

Has anyone compared these headphones? A local dealer has the $499.00 Shure headphones but not for demo and returnable for store credit only.

I bought the etymotics years ago as the killer high end in ear headphones but never really loved them.

A bit claustrophobically uncomfortable - even with custom earpieces -- and a bit thin in the bass.

I continue to dream of truly portable high end sound for business travel and wonder if the Shure products are worth a look.

Thank you.