My Etymotics are on the verge of dying. I'm going to take a shot at repairing them, but if I fail I was wondering how the S-Plugs compared. They certainly look like they fit well. Is the sound quality and noise isolation comparable? How durable are they? http://www.plugup.com/the_S_plug_stereo_earbuds_s/67.htm I know they have a 30 day guarantee, but wanted some input.