I have been trying to decide between machines. I have think I decided on maybe the lower end 27 imac. I wanted to save a bit on the CPU and buy a pure ssd. I use my computer for Audio. But Im wondering... Is the 2.9ghz i5 Quad core comparable to the 2.6 ghz i7 Quad core. I have searched the forums but Im a little confused by the results. I know that the i7 supports hyperthreading etc, but generally mobile cpu's are less powerful. Are they about equal? The guy on the apple chat says he rekons the i5 has a bit more power. Im thinking the 2.9 ghz i5 might be a nice cpu to go for. The cost increase between 2.9 ghz i5 and 3.2 is prob not worth it to me. I don't need a great deal of graphics power either. What do you guys think?