i need a gpu for my nephews rig which will used for gaming at 1280x1024
choices are:
Newegg.com - EVGA 256-P2-N751-TR GeForce 8600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Supported Video Card - Retail
Newegg.com - ASUS EAH3650 TOP/HTDI/256M/A Radeon HD 3650 256MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
Newegg.com - MSI RX2600XT Diamond Radeon HD 2600XT 256MB 128-bit GDDR4 PCI Express x16 HDCP Ready CrossFire Supported Video Card - Retail
Newegg.com - SAPPHIRE 100220L Radeon HD 2600XT 256MB 128-bit GDDR4 PCI Express x16 HDCP Ready CrossFire Supported Video Card - Retail
rest of the rig:
Intel C2D E4500
Intel D975XBX1
2x1GB Transcend DDR2 800MHz
Hitachi 7K160 HDS721616PLA380 160GB SATA2
Corsair VX450
Antec TX1088AMG
6k budget max

choices are:
Newegg.com - EVGA 256-P2-N751-TR GeForce 8600GT 256MB 128-bit GDDR3 PCI Express x16 SLI Supported Video Card - Retail
Newegg.com - ASUS EAH3650 TOP/HTDI/256M/A Radeon HD 3650 256MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
Newegg.com - MSI RX2600XT Diamond Radeon HD 2600XT 256MB 128-bit GDDR4 PCI Express x16 HDCP Ready CrossFire Supported Video Card - Retail
Newegg.com - SAPPHIRE 100220L Radeon HD 2600XT 256MB 128-bit GDDR4 PCI Express x16 HDCP Ready CrossFire Supported Video Card - Retail
rest of the rig:
Intel C2D E4500
Intel D975XBX1
2x1GB Transcend DDR2 800MHz
Hitachi 7K160 HDS721616PLA380 160GB SATA2
Corsair VX450
Antec TX1088AMG
6k budget max