I had the UE super.fi 3.. I think it is very accurate with pretty alright noise isolation. I think you should go to www.head-fi.org for more information and comparison about earphones. Personally I think UE is more neutral but with more solid bass while Etymotic is detail but lack bass. As for Shure, I don't own it but I got friends who told me it sound very colored.
Cheers.
Cheers.