I got my Powerbook there is a little less than a month and I am more than satisfied. Tests with Reason and Live are very conclusive.
I especially like Mac OSX is really the best OS is being done. It is very stable and perfect for computer music.
I spent years on PC and I'm not ready to return. Apple machines are for me what is best for making music.
It is true that the ordinaterus were a bit expensive, but when you see the results, we do not regret the purchase.
There Yune only thing I regret not having bought one before ...