>b) a legal paid up copy of Mac OS X so am struggling to work out why this isn't completely legitimate.
Which requires you to have another new Mac around so that the stupid ass Mac store will actually allow you to purchase and download it. Apple goes out of there way to make sure they check your machine before they even legally allow you to join their club. Your money is not good enough for them unless your membership card is up to date.
>Perhaps thats the problem and why the Saintly all-knowing, never wrong, android hating Jobs never really liked the Pro and why Acolyte Cook is struggling to replace it. It works, it doesn't go wrong (for me) and its cost effective.
Exactly Apple hates any system that can be upgraded in any way. They only believe in the making fancy enclosed appliance like stuff that must be replaced every few years an not upgraded. And they don't push the Mac Pro much because as you say at least when I bought mine it was actually cost effective to comparable dual socket PC of the era.