Are all of these parts compatible?

[timmay12]

I would like to build my first gaming pc. I would appreciate it if someone can look over all the parts and make sure they all fit. Any feedback on the parts/build is appreciated.

Intel Core i5-2500K 3.3GHz LGA 1155 95W Quad-Core Desktop Processor
MSI P67A-C43 (B3) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CORSAIR Enthusiast Series CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply
MSI R6950-2PM2D2GD5 Radeon HD 6950 2GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
2 x SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive
LITE-ON Black 24X DVD+R 8X DVD+RW 8X DVD+R DL 24X DVD-R 6X DVD-RW 12X DVD-RAM 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM 2MB Cache SATA CD/DVD Burner - Bulk - OEM
Antec Three Hundred Black Steel ATX Mid Tower Computer Case
Acer G215HAbd-1 Black 21.5" 5ms Widescreen LCD Monitor 300 cd/m2 ACM 50,000:1
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-4GBRM

It comes out to be about $1054.

I can get 8gb of Cas 9 ram for about the same price as 4gb of Cas 7 ram. Which one is worth getting?

 

[mosox]

Get some 1.5V RAM
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231443
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231439
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231438
mobos + RAM
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.633024
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.632492

Combo
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.636362
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.636452

another combo with the CPU
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.635170

Get a bigger monitor
http://www.newegg.com/Product/Product.aspx?Item=N82E16824009266
even if you have to get a single HDD.

Alternative for the case
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119233&Tpk=HAF%20912

and for the PSU
Antec NEO ECO 620C 620W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371031
Antec TruePower New TP-650 650W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371021
SeaSonic M12II 520 Bronze 5
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151093
SeaSonic S12II 520 Bronze 520W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094&cm_re=SEASONIC_520-_-17-151-094-_-Product