Don- re: PMB: I pull out the SD card, install in a fast reader, and copy the files (sometimes in seconds, depending on the size of the files). In my experience this is much faster & more convenient than hooking up the camera and using PMB (which was comparatively slower & clunkier).
Tom- perhaps an easier way to explain current Macs is that they stopped being 'Macs' when Apple switched over to Intel. All Macs are now PCs in terms of hardware. The only major difference is the EFI bios (though newer PCs also use EFI bios now). Mac Pros are built on an Intel server motherboard variant (sound is from a RealTek chip); the other Macs are custom, much in the same way laptops are custom, but still have PC components (Macbooks/Pro/Air are PC laptops, made by the same companies who build PC laptops. They are completely customized to Apple specs, just like Dell & Lenovo laptops are customized). The reason that it is so easy to get a "Hackintosh" running on a PC is that OSX runs on PC's with a custom bios. Once past the bios issue (various workarounds), it's easy to install OSX on a PC clone.
Taiwanese manufacturer Quanta builds Sony Vaio, Lenovo, and Apple laptops: all PC hardware.
I used to custom build all my PCs (Supermicro, Tyan, Asus, Gigabyte, etc.) using all the best parts (best GFX, network (before integrated), sound cards (before integrated), SCSI (before integrated, before SATA became dominant), best power supplies (Seasonic, PC Power & Cooling (used to go the plant in Carlsbad and get them direct; including seeing some cool demos from Larry Aldrige)), and best RAM (Corsair, Micron, etc.). In 2006, I found I could buy an off the shelf Mac Pro cheaper than I could build a high-end PC. In late 2010, a 12 core Mac Pro was still cheaper than anything I could build from parts (though I could build something faster, it would also be much noisier unless water cooled). Rumors are that the Mac Pro won't be continued much longer; that's too bad, Apple made one of the best PC's ever (very quiet!), for a reasonable cost (and you can run OSX too
Again, I need to use the Q5000 for a project, but will do the card swap with the 285 when finished & report back. Thanks for the tip noting that the GTX 285 is stable with Vegas 10e in your Mac Pro.