This is to all of the Hardware junkies out there, Rane's Serato Scratch has upgraded their audio interface box with the "NEW" SL 3. That's right! Now, how is this better than the SL1 you asked? They have upgraded the USB to the current 2.0 speed, a 24-bit audio process with up to a 48kHz converter, 3 I/O (audio inputs and outputs), and more! I am a Traktor Pro user but am up for toying with this. So save up ya money for the new hardware, unless Traktor comes out with something then... well to each his own. GETTA CLUE! Leave ya comments!