Reply to Maschine Setup

I am believeing about buying a Macbook Pro 13" with 2 GB Ram and a Maschine to be my initial setup.
I really want some different type of controlling instead of the usual Cdj's and a Mixer.
I would like to know what u guys believe of this setup. Is the Macbook Pro good enough? 2 GB Ram?
What soundcard will I need to controll the four decks through Maschine since i'll do internal mixing?
I do really not need the four decks but at least 3 because i want to mix 2 songs and use some samples created by me on maschine.

Waiting for your opinions!

Thank you!