First time building, any assistance would be awesome!

As the title says, this is my first attempt at trying to build my own system. Trying to upgrade to more of a gaming computer. What I am looking at using:

Intel BOXDH67CLB3 LGA 1155 Intel H67 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Intel Core i5-2400 Sandy Bridge 3.1GHz (3.4GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 2000

GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP

COOLER MASTER Hyper 212

G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600)

ASUS XONAR_DG 5.1 Channels PCI Interface Xonar DG Sound Card

Coolmax VL-600B Power Supply - 600-Watt

Acer V223WEJbd Black 22" 5ms Widescreen LCD

As for the hard drive I am not sure if I will have to change that as well. Sorry if there is information lacking or missing items. Any help or tips would be great, mainly want to make sure everything is compatible and if there are any improvements that could be made while staying around the same price. Any help is greatly appreciated!!

------ Links-----


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...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.tigerdirect.com/applications/searchtools/ite...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...