I'm a sysadmin for a lare design agency that is about 70% Mac. I've grown to really hate Apple for dropping of the XServe and all the server related products, and that's not talking about the anger I feel for the increasingly erratic usability and interoperability issues that OSX is bringing lately. Apple's deliberate hostility towards anything legacy, such as its dropping of all PPC support in 10.7 (and all Mac OS 9 support back in 10.5) makes supporting Apple a much more expensive proposition than supporting windows, even though OSX needs much less in the way of support than windows does in my experience.
In your post, you're only wrong about one point: Imaging a Mac from a standard image is a lot easier than it is in windows. You don't actually need pxe.