Updated: Core i5 iMacs are fast, but early Core i7 benchmarks show 30 percent performance gains. A good upgrade for $200 (which adds 10 percent to the $2000 price). Timon-Royer’s graph uses Geekbench 2 results (OS 10.6.2). [Timon-Royer]
https://gizmodo.com/first-of-the-quad-core-i5-imac-benchmarks-5403593
