Any more crashes to report? All is stable?
Oh, before I forget... if you switch to mac, you don't need to run out and buy all new equipment. I'm running a plotter and a wide format printer with a RIP on my machine. Also, in regards to having to buy new software, you don't. If you run a mac and have all windows based software, you can run them in Parallels 4.0. Sounds stupid to buy a Mac only to use the windows side exclusively, but from what I hear (and I do have to use my windows side myself for Production Manager) that XP and Vista run more stable and don't crash like they do on WinTel machines. Just better wired insides and hardware matched.
It's only $79, and you already have copies of Vista or XP. You only need any Mac with an Intel chipset, and used machines can be had for a song and a dance on Craigslist all the time.
For instance, here's a MacMini for $375 in your area. (Granted you'll want something larger than a mini, but this will do the things you want it to AND run windows too!)
http://seattle.craigslist.org/see/sys/1196839674.html
iMac 20" for $800 :
http://seattle.craigslist.org/see/sys/1196138096.html
(I run the 24" 2.4 ghz processor, it's a little older, but fills my needs perfectly... and I always run/process/RIP/batch full size files 4'x8' @ 200 dpi etc...)
iMac 24" for $1100 :
http://seattle.craigslist.org/est/sys/1190426361.html
Check out this listing, comes pre-loaded with Adobe CS3 Suite!
http://seattle.craigslist.org/est/sys/1188137887.html
Anyway, not trying to be a dick or add to your frustration... I just wanted to add some options to help you out of your trouble. Because ONE down day could be disasterous for us Design People!
Good luck, and I hope you can get things sorted out.