My sony earbuds broke today and im bummed out. Ive done alot of searching on old threads and it seems like in a $100 price range the V-Moda Vibe or Shure is the way to go. My question is whats the difference between the $100 headphones and my $40 headphones I had. I use my headphones at work and there usually loud machinery behind me and I use to run in my sonys. Im thinking of just picking up a cheap pair for running in.