I am a major mac addict... I'm so addicted to macs, I cant stand anything else.
If I were you, I would not buy mac book just yet.
Why? Apple is notoroius for using people as testing rats when they release something new... especially the new processor machines.
I'd wait some time untill future generations of this technology, and then buy it, after they fix the hardware bugs etc.
For now... I'm using a MacMini and quite happy with it.