First build and need help getting OS X running on my system. Its not completely finished yet, all i have currently installed as of now is.....

Mobo- Asus P7P55D-E LX, P55 chipset, 4DIMM DDR3, LGA 1156, USB 3.0, SATA 6GB/s
HD- Wester Digital Caviar Black 1TB 64MB Cache 6GB/s SATA
PSU- Corsair Professional HX 650W (Modular) is there anything i should stear towards to make running OS X easier? I was thinking of running an i7 processor as my next purchase but thats as far as ive gotten financially. I would really really appreciate somebody helping me through this process. If anybody has suggestions on the remainder of my items i need to buy that would be cool too. Thank you very much to anybody that will help me.