Question: Duo or Quad Core? Ive got around AU$1,500 to spend on a new box. box only. My question is what is the difference between Duo and Quad Core? there are drastic price differences. I read that the best Quad Core that my store sells is something like 2.66Ghz... with 2x 4Mb L2 Cache???... i know thats got something to do with something but no idea... Would i be better off just getting a normal P4 3.0Ghz or a Quad 2.66Ghz [i think it was]????