Hmmmm . . .
My vote so far goes to Procopius, for his nice, clean, compact system that appears to take all of 2 minutes to set up and take down, yet has everything at his fingertips.
Most of the others, it appears they are not necessarily "rigs for gigs" but geared more toward home use -- either digitizing vinyl, making recordings/programs for road use, or just plain having fun making cool sounds at home. I find these setups every bit as interesting, as my own home installation is rather helter-skelter and would like to consolidate things in a better arrangement.
For me, out of four computers, three are used for music. One of these is the laptop I use for gigs. The others are used for digitizing music from records, CD's, tapes, and whatnot. Of the two desktops, one is my business computer which is also a Windows 7 64 bit. I use it for audio editing using Sound Forge 10a, and for testing/practicing/production. The other is an older computer that I didn't trade in -- it runs XP and has very little on it. Downloads? This one. Suppose it gets a virus and wipes out everything for a total loss -- big whoop.
For hardware I've got my "vinyl" DJ rig which includes two Stanton STR8-80 turntables. Since I deal mainly with oldies, and like to collect vintage recordings, these turntables with Stanton 500 carts (and an extra head with Stanton 78 needle) do a wonderful job -- but of course I have to set up the casket somewhere to connect it all to the computer. My ideal setup would be a good transcription turntable (yes, I have a number of 16" radio transcriptions) set up permanently with the old computer, along with tape decks, etc., all for the purpose of retrieving music from other sources. The new desktop for editing and production, the laptop to take to the shows.
In addition to a transcription turntable, my wish list includes a nice piece of furniture to hold the computer AND the stereo components, and looks nice. Have yet to find anything that comes close.