My very first build, HELP PLEASE!

This is my very first build and I have a bugdet of $275 or less. I will be using this computer for mainly school and music, but I would like to be able to play games like Oblivion Elder Scrolls or Total War series or COD4 or Fear and ect, on High settings and have them play pretty smothly. Anyway, here is what I have to work with.

CASE= APEVIA X DREAMER II
PSU= TURBOLINK 420W WITH 28 AMPS ON THE 12V RAIL
2X OPTICAL DRIVES BOTH IDE
1X SATA HDD WITH CABLES
4X CASE FANS ALL 80MM
KEYBOARD AND MOUSE
PROVIEW MONITOR

Here is what I have been looking at for the rest of the computer.

MOTHERBOARD= Foxconn A7GM-S AM2+/AM2 AMD 780G HDMI Micro ATX AMD Motherboard

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PROCESSOR=AMD Athlon 64 X2 5600+ Processor ADO5600DOBOX - 2.90GHz, 1MB Cache, 1000MHz (2000 MT/s) FSB, Brisbane, Dual-Core, Retail, Socket AM2, Processor with Fan

http://www.tigerdirect.com/applications/SearchTools/ite...

MEMORY= 1X Corsair Dual Channel TWINX 2048MB PC6400 DDR2 800MHz E.P.P. Memory (2 x 1024)

http://www.tigerdirect.com/applications/searchtools/ite...

FANS= 1X Aerocool Silver Lightning Quad White LED 120mm Case Fan

http://www.tigerdirect.com/applications/searchtools/ite...

GRAPHICS CARD= Here is were i need help cuase i dont have the funds but I do need something good for the games i want to play so i have a couple of cards here for people to give me suggestions on.

#1.ASUS EAH4670/DI/512M/A Radeon HD 4670 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail/ http://www.newegg.com/Product/Product.aspx?Item=N82E168...

#2. PNY GeForce 9500 GT Video Card - 512MB DDR2, PCI Express 2.0, (Dual Link) DVI, HDTV, VGA
http://www.tigerdirect.com/applications/SearchTools/ite...

#3. BIOSTAR V9402GTG1 GeForce 9400 GT 1GB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

OK! so please give me any suggestions please and it will be GREATLY appreciated. I am also willing to downgrade the processor to put more into the graphics card or maby change to a diffrent motherboard or both.