I gave in. I purchased a Mac Pro. Clocking in with 2 x Dual Core 2.66Ghz CPUs, 2Gb RAM and the 512Mb ATI X1900 video card, it's one hell of a machine. The first boot it ever did took around 18 seconds - very quick. Of course, the first thing I had to do to it was throw in a second 160Gb SATA HDD and throw Windows XP on there (for those all important games). I must say that I'm quite impressed with bootcamp (which allows you to boot Windows on the Intel Macs). The one thing that does annoy me is that it doesn't give me the menu so I can pick which OS I want to boot to on startup - something I miss from other boot loaders such as grub.
I do have some hassle with the Logitech LLC drivers causing the mac to hang on shutdown, and even making the mouse buttons not work (however I can still move the pointer), however these have been reported to Logitech and I'm sure will be fixed soon.
All in all, a grunty as hell machine, and very nice to play games on ;)