Christmas Upgrade

Hello, for Christmas I was considering upgrading my computer with some new components.

Currently I have:
Computer Case: HAF X
Motherboard: ASUS P8P67 REV 3
Graphics Card: EVGA gtx 570 Superclocked
RAM: 4 GB Corsair Vengeance 1600Mhz
CPU: Sandy Bridge i7 2600k
PSU: 1000W
64GB SSD
1TB SATA III HDD
Stock fans for CPU and case

I was thinking of replacing the motherboard, RAM, and the CPU fan. I was also considering adding another gtx 570 and running them in SLI. I will be using two monitors as well.

I intend on getting:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Any thoughts on this upgrade? Too much or non-compatible? Let me know!