I agree with genghis, the only thing the i7 2600k gives you is hyperthreading. You can buy a HDD like that for around $60. I'd look at the Cooler Master Hyper 212+ for the heatsink for about $30. Finally, you don't need 1866 speed RAM, it is basically no difference. Get any 1600 speed for around $100.
It isn't necessarily faster, it really only includes Hyper threading. Hyperthreading really only helps in VFX, 3D Modeling, or other extremely strenuous programs. It's also ~$100 more expensive which is money where you could spend on other things for your PC.
My experience with the sata 6Gb/s compared to 3Gb/s on a 7200rpm drive showed zero improvement in real world or benchmark testing. I have also read on this site that mechanical drives dont even utilize the full 3.0Gb/s bandwidth. I agree with the others on saving the hundred on the cpu, maybe put it towards an SSD for your boot drive (the sata 6.0Gb/s bandwidth might come in handy with and SSD but i dunno cause i dont have one).