As for the comparison between mackie pre's and the digimax.......
I think mackie pres sound sterile, not in a good way either. They are very quiet but cold to the touch. Maybe ok for electric guitars or toms but that is about it in my book. I have heard some good work done on a mackie board.....its just not my cup of tea. I like the Digimax pres for the value. Pristine in quality, not too colored. Not to the quality and "strait wire gain" of Earthworks preamps but a good value for what you have to spend.....$500-$600 on ebay.