I have been advised that the shure E2C headphones are of great quality and are worth 60-70 USD. Is there anyone who as any experience with these headphones who would like to give me some input? how well do they isolate? The past ear bud headphones I had did not stay in my ears all that well, do these stay in your ears? Are they comfortable? Would they stay in my ears even while doing something such as jogging? I would greatly appreciate a response from anyone that can help me. Thank you.