I've have an ongoing love-hate affair with my Presonus Firebox. I've never had any issue with the unit at all, 'but' it has a low level noise (hissssss) that seems to permeate everything I do with it. Doesn't matter if it's recording bass via different preAmps, direct into it, or vocals, keyboard, etc. All have the same hissssssss. Plug nothing into it and turn up the gain past 12:00 and hisssssssssss.... it's driving me nuts. So... any thoughts on varying priced Firewire interfaces that aren't locked into one software package? 2 - 4+ input is more then fine. Definitely needs to be an Intel Mac oriented device. Looking forward to others thoughts.