My girlfriend loves her Westone UM-1's, but she destroyed her first pair by wearing them at the gym. Can anyone recommend a set of in-ear headphones that fits the same (uses the same ear pieces) but is cheaper? She doesn't really care about sound quality but wants the fit and sound isolation provided by the UM-1's. Is there something significantly cheaper or should she just keep paying $100 for UM-1's and destroying them every 6 months? Thanks!