Gahrgoyle,
Trust me when I say that there is little difference between
Mac and Windows hardware and OS. If you're a
QLab guy, go with
Mac. If not, go with Windows (you may save a lot of money). I designed a show for a "cirque" company in
QLab on my workstation, exported the show and imported it on a MacMini running
QLab at the theater. The MacMini belonged to one of the performers and was her everyday desktop. It was atrocious.
QLab kept crashing and the
system was very unstable. I grabbed a spare hard drive, swapped it in the MacMini, did a clean install of the OS and
QLab; perfection.
Moral of the story: Regardless of
Mac or PC, show control computers must be kept single-purpose, un-networked (meaning internet) machines to ensure ongoing reliability. Keep a separate content creation workstation to create shows. Show control computers are entirely there for control and playback. Don't think of it as a "computer". Think of it as a machine that only does show control and playback.
Skip the ramdisk. All
current professional
level playback software pre-caches cues into
system memory, essentially creating it's own ramdisk. Go with 4 GB of RAM and you'll be fine. I have 10 yo machines running WinXP, SFX Pro and 512 MB of ram that will run extremely complex shows with multiple simultaneous sounds.
Latency issues tend to be much more of a problem on workstations with multiple, competing software installed, or machines accessed by people who do stupid things to it, like install games. I have never had unsolvable
latency or stability issues with any of my PC based DAWs in almost 20 years of doing this. The simple solution is to change the way we think. If you have a "mission critical" purpose, like show control/playback, multi-track audio recording,
etc, we need limited purpose "computer appliances" not general purpose computers.
A lot of what you
call "
latency issues" often depends on how well the software addresses the hardware. If you have a well written piece of software that is designed to control
DMX lighting, sound playback and video playback simultaneously, I can't imagine a difference between
Mac or PC. However, I can't think of a single pro (or
amateur for that matter) who wants separate lighting, audio and video control software running simultaneously on one machine whether
Mac or PC. I personally would
throw a fit! The software would have to
play exceedingly well together, addressing hardware resources without starving said resources from each other.
We've gotten to the
point with technology that computer hardware is rarely an issue. A $400 PC (minus audio/
dmx interfaces) would be a fine show control
system, providing the software is solid.
Just my two-cents.
Good luck,
~Alden