Hi I am interested in a Macbook but I have heard some bad things about the GPU. Will it be better than my current desktop PCs GPU(Nvidia GeForce FX5200 128 MB w/o heatsink) Does it have a decoder or something like the new iMacs? Will it be able to play high end HD video that really strains the computer? Will it be able to play Wolfenstein Enemy Territory? Will it be able to carry out low end graphical stuff? Like making buttons for websites? What other limitations are there?