I bought a westmere 8 core 2.4 when it came out to replace my trusty old 2.66 dual core MP. Is it any better or quicker for most of what I do? Not really. Don't expect too much of a performance bump.
If you use large library VI's, they cannot spread over several cores, so the speed of the processor is te main issue. It was Mike that alerted me to this in the first place.
That said, it has been solid, and I can't complan about how it has travelled over the last 2 years. I was advised against 6 and 12 core machines by the mac guy (who probably didn't know what he was talking about... the world of 6 core hasn't fallen in). I was just hoping for it to leave my old machine for dead, which it didn't do. Except that my old machine had just died, which was why I jumped.
I have since had my old machine fixed... one of the early intel core 2 duo 2.66 machines, and I use it in studio B. It is still a good performer.
Apple CEO Tim Cook has promised something really special for MacPro sometme in 2013. I'd be waiting til then, if you can.
http://www.macworld.com/article/1167247/cook_apple_planning_professional_mac_for _2013.html
But $2700AU is a LOT less than I paid, so... Why are they so much more expensive in OZ? And can you even get the 8 core anymore? Why don't they put 2 of the 3.2gig quads in a machine to make an 8 core at 3.2? And why have the 12 core machines been slowed down to 2.4?
We are slaves to Apple.