On the subject of desk ergonomics and efficiency, for anyone interested, I recommend looking into a professional-level KVM. If the individual machine is on, I need to do nothing else: I switch all my input (video, USB, sound output, sound input) with keyboard shortcuts without needing to even get up. Excellent when jumping between your home office work computer, your PC, your many Macs and other misc. devices (in my case, also a Rasberry Pi, PSVita TV, with more game consoles to come).
In my case I use a dual-link DVI-I KVM that supports a dual-link DVI-D monitor and a VGA or DVI-A monitor, so I can switch to my 4:3 CRT for games etc. and a nice, big 16:10 LCD monitor (which would be great to one day replace with a 1080p RGB OLED monitor, and/or a 16:10 huge CRT... if money allowed) for everything else. I love DVI-I for bridging the digital and analog worlds of devices the best, but other KVM types also exist. My particular KVM supports 8 input devices, but if I bought more, they are designed to be stacked (over 100 devices) by functioning as one. (ATEN CS1788 is my specific KVM -- there's also a quite cheaper single link version, called ATEN CS1768.)
They also work great with USB hubs: I have 4 different game controllers plugged in, and I can use them on all my devices (minus PSVita TV) without having to do anything, like replugging, getting up etc.. So switching between i.e. a native Mac OS 9 game or a native Windows 7 game, everything is already set up. Could also plug-in USB floppy and ZIP drives that way. I just don't also plug-in my USB 3.0 Blu-Ray burner, because my KVM is limited to USB 2.0, and I already have a FW400 Blu-Ray burner for the Macs, too.
Maybe this subject could have its own topic. Surely there's one out there already, I presume. But to keep it on-topic (kinda): I'm sure Mac OS 8.6 on my MDD would still work with this, so I'm looking forward to it.
