What is the best Scratch Dj/ Battle Mixer: Here are the choices: Rane TTM 56/ 57 SL Pioneer DJM 707/ 909 Vestax PMC-05/08 PRO Denon X-300 Numark DXM PRO Stanton M 202 Ecler HAK 380 Allen & Heath Xone 2 OTHER please comment to add a mixer to these choices!!!