First Custom Built PC Component Selection Help

Hi all, this Christmas I plan to build my first custom pc, and therefore I am seeking advice on a build that I have formed from looking at others advice. My current PC is around 4 years old (Q6600 @ 2.4 ghz, 3 gb ram, etc.). However, I did buy an nvidia 570 a few months back to get me started on some pc gaming, so I do not need a new GPU. Here it goes:

Approximate Purchase Date: Within the next few weeks

Budget Range: ~$650

System Usage: Gaming

Parts Not Required: Keyboard, Mouse, Monitor, Graphics Card, PSU

Preferred Website(s) for Parts: Newegg and/or Amazon

Country: US

Parts Preferences: Intel for processor and ssd

Overclocking: I want the ability to overclock if I decide to

SLI or Crossfire: I would like a mobo that supports it in case I do SLI

Monitor Resolution: 1920x1080

Parts:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
OOLER MASTER HAF 912 RC-912-KKN1 Black SECC/ ABS Plastic ATX Mid Tower Computer Case

http://www.amazon.com/Corsair-Vengeance-PC3-12800-1600m...
Corsair Vengeance Blu 8 GB (2X4 GB) PC3-12800 1600mHz DDR3 240-Pin SDRAM Dual Channel Memory Kit CMZ8GX3M2A1600C9B

http://www.amazon.com/Intel-2-5-Inch-Solid-State-Drive-...
Intel 320 Series 80 GB SATA 2.5-Inch Solid-State Drive Brown Box
[I already have some large internal HDD's for extra storage]

http://www.amazon.com/gp/product/B004EBUXHQ/ref=as_li_s...
Intel Core i5-2500K Processor

http://www.amazon.com/Windows-Premium-64bit-System-Buil...
Windows 7 Home Premium SP1 64bit (Full) System Builder DVD 1 Pack

Now the issue of a mobo. For me this has been the hardest to determine as I have a budget constraint in the range of $100-130. This is one I have seen recomended but I am completely open to suggestions. My main priority is sli capability.

http://www.newegg.com/Product/Product.aspx?Item=13-128-...
GIGABYTE GA-Z68XP-UD3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Thank you for any and all help!