Hey i'm ordering my new 24" iMac soon than will come the digi 002 rack. I'm just not sure how the multi channel preamp works with the 002 can anyone sum that up for me? What does it need to have/do? Also which would you recomend on a budget. The guy at my local pro audio store recomended a prosonus one not the firepod but another one that was 1300 bucks which is way to high for me.... so can anyone help me out???? thanks in advanced.