Hi! I am trying to decide which of these two 27 inch imacs I should buy: 27 inch 3.06 core 2 duo model 27 inch 3.2 I3 model Is the 27 inch 3.2 ghz I3 model a better value in terms of increased computer and graphics performance and is it better to get the 2nd generation model because of prior issues (i.e. yellow tinge)? I have never owned an imac computer and have had horrible experiences with pc desktop computers and would appreciate any feedback/comments on which 27 inch imac model I should purchase. Thanks in advance.