What Pro-Level MIDI/Audio Tools Are You Using?

groovemaneuver asks: "Over the years, I've managed to build a small home-studio for composing and recording my music. The one component that has always been the biggest obstacle to my productivity has been the digital audio workstation. I started with a MIDI-only Atari, moved to a PC with Logic Audio, and now have a Mac with Logic Audio. The problem is that I seem to spend more time trying to get the software and hardware working than I do actually making music. I really love Logic Audio, but I can't stand the Mac. Surely some of you out there are having success on the PC making music. What are you using, and how much of your time is spent fiddling with your studio rather than making music? Is there Linux software that can reasonably fill the shoes of Logic, Nuendo, or Sound Forge?"