Just picked up this processor today with a motherboard. If you can afford it I highly recommend it for Dolphin Emulator. I've got it clocked @ 4.3GHz now and I'm seeing huge performance gains over my 775 @4Ghz. I'd like to squeeze 4.5 -4.6 out of it if I can.
Sandy Bridge i5 2500K @ 4.2 GHz
4GB Ram clocked @ 1600MHz
Nvidia 460 GTX 1 GB
4GB Ram clocked @ 1600MHz
Nvidia 460 GTX 1 GB