I'm getting ready to replace my stand-alone digital recording station with a computer-based system and had a couple of questions. I'm looking at getting Cubase 3 Studio w/ a Presonus Firebox for my PC. My goals are simply to be able to record high quality bass/guitar/vocals. I don't have a need to record more than 1 instrument at a time. Given that I already have a Firewire-based system, is there any other hardware I need or are these two purchases sufficient (I'm not interested in a mixing station at this point, as I'm perfectly content mixing on-screen with the mouse).