Aftermarket will put the bars higher up depending on if you go +1 or +2. They are stronger and don't break as easy as the stock one. They also reduce bump steer. I had the houser +1 with anti-vibe clamp and i liked it. Ed Teixeira makes a really nice stem as well. I bought mine from another member who bought it but never installed it. So i got a good deal. Otherwise i would have got one of the nickel plated stem's from Ed! Hope that helps.