First Build $1000 limit Need finishing touches

I might have posted this before but couldnt find it so here it is again.

This is my first time building a pc and i wanted a few suggestions
First off im not sure what power supply i should use. I also want to know if all my parts are compatible. Since this is my first build I dont plan on overclocking much if at all.Besides the power supply am i missing anything? Do i need to buy thermal paste? The case I plan on buying says the power supply is bottom mounted; does that matter? If theres any parts that would work better please leave a link in your reply.

Here's my list so far:

Intel Core i5-2500 Sandy Bridge 3.3GHz
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

GIGABYTE GA-Z68A-D3H-B3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBRL
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

MSI R6670-MD1GD5 Radeon HD 6670 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

LG DVD Burner Black SATA Model GH24NS70 - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Western Digital Caviar Blue WD5000AAKX 500GB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Antec Nine Hundred Black Steel ATX Mid Tower Computer Case with Upgraded USB 3.0
http://www.newegg.com/Product/Product.aspx?Item=N82E168...