If I were to put one together I would look to get maybe 20 more dollars at least 300 minimum and use the following
http://www.newegg.com/Product/Product.aspx?Item=N82E16811147031
Rosewill R604TSB-N 120mm Fan, mesh air filters & Tool-Free kits ATX Mid Tower Computer Case,with 450W Dual Fan Power Supply ( Decent PSU willpower the listed items with no problems ) $59.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16813186143
Foxconn A7VMX-K AM2+/AM2 AMD 780V Micro ATX AMD Motherboard - Retail
AMD 780V and DX10 experience w/ DVI, VGA and Gigabit LAN ( great board and will take phenom up to 95 watts for upgrade later? ) $54.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16814141081
BIOSTAR VA4673NH51 Radeon HD 4670 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail Integrated with HDMI port and HDCP ready ( MUCH stronger card this will let you play crisis at medium settings ) $76.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231122
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory ( quality memory with respectable timing if the desire to oc later )
$39.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103211
AMD Athlon 64 X2 5000 Brisbane 2.6GHz 2 x 512KB L2 Cache Socket AM2 65W Dual-Core Processor ( A decent proc for games as at this price level there is very little difference in playability ) $54.99
with shipping this comes to $297.50