MaAK__ :
I don't have the motherboard and the actual CPU yet. Should I buy it and the mobo?
No. There's little reason to invest in 5 year old technology. If the budget is tight, you simply wait until the budget is larger for newer hardware.
What components do you have?
What is the purpose of the build?
What is your budget?
Right now I have a GTX 560 Ti Gigabyte OC 1GB, 16 GB Ram of DDR3 Kingston and a case plus hard drive.