Which one? I have a 002R and I'm replacing my mackie 1604 vlz pro with one of these units. I think i have to buy a add-on card for the octopre to get it to my 002 whick brings them to about the same price. Correct me if I'm wrong, please. For drums mostly. Or is that not really a good upgrade from the XDR pres on the mixer? Thanks for the input. :?