Re: ATI or Nvidia
Amd = cheaper, cooler, faster (for games), and use less power. Also has 64-bit tech and has better dual cores cpu's too.
Intel= expensive, HOT, slow when hot, and uses a lot of energy. Some cpu's have 64-bit (EM64T) and their dual-cores stinks compared the the X2's.
Macbook Pro and Logitech z5500s. All you really need.