PC World posted a review on the 27-inch Core i5 IMac/3.6GHz BTO

After posting our benchmark results for the four new standard configuration iMacs, several readers had the same request: test the new 3.6GHz Core i5 iMac, a built-to-order (BTO) option for the 3.2GHz Core i3 iMacs. You spoke, we listened and we ordered a custom 27-inch iMac with the 3.6GHz Core i5 dual core processor, though we upped the ante by adding a second drive to the system, a 256GB solid-state drive (SSD) to complement the 1TB 7200-rpm drive that comes standard. We tested the system twice (once booted from the hard drive and then booted from the SSD) and the results are intriguing.

The drive and processor upgrades add $750 and $200 respectively to the cost of the standard $1699 27-inch 3.2GHz Core i3 iMac, bringing the price to $2649.

  Lab Tested: 27-inch Core i5 IMac/3.6GHz (BTO)