My suggestion is all about saving money. If you plan to keep your build around for a long time then getting an i7 makes some sense... thing is, you can keep an i5 around for a long time too - especially ivy-bridge since it uses less power and runs somewhat cooler. But, whatever rocks y'all boats.
Carbide
Case: Corsair 500r | Motherboard: Asus P8 Z77-V | Processor: i7 3570k | Memory: 16GB Patriot IEM 2133mhz | SSD: Corsair Force Series 3, 60GB | ODD: LiteOn DVD Burner with Lightscribe | PSU: Corsair TX650M | GPU: EVGA GTX560 DS SSC | Cooler: Zalman CNPS9900 Max- B