Is the new Santa Rosa MacBook than the previous? Is it THAT big of a difference? I have heard that the X3100 is just a minor speed bump, the processor speed is just a small bump, and the bus speed means nothing since you cannot use 800 mhz memory. Is this true? I am thinking of selling this one and buying a c2d previous generating with the GMA 950 since that graphics card supports 16-bit color, but if this MacBook is faster, I guess I could stay and hope for a graphics driver update.