New Budget Build, Need advice before new year buy

Approximate Purchase Date: ASAP

Budget Range: $600

System Usage from Most to Least Important:Home Theatre and Gaming

Parts Not Required: Monitor, just going to use my 42" 1080 TV

Preferred Website(s) for Parts:Newegg and Amazon

Country: USA

Monitor Resolution: 42" 1080 TV

I am looking at the following components to build a new hme theatre/gaming pc but on a strict budget. I was hoping this could play most games such as BF3. And is the PSU enough power? if you see where I can save more money please offer.

CPU: Phenom ii x 4 965 Black
GPU: HIS Radeon 7750 2GB
MOBO: ASRock 970 Extreme 3
RAM: G.Skills Ares 8GB
HDD: Seagate 1TB 7200RPM
CASE: Antec 300 Illusion
PSU: Antec 450w 12v
Optical: LG 14x Bluray Burner
OS: Windows 7