Need a bit of advice. At church, we are buying a "design" laptop. We will be running CS3 on it. We are on a budget of course and will be buying refurbished, so what's better? A 1.83 Core Duo MacBook Pro with discreet graphics or A 2.0 Core 2 Duo MacBook with integrated gaphics We will be upgrading RAM to 2 Gig, 13" or 15" screen is fine as for deskwork we will be using an external monitor. Thanks for the advice!!!