Autodesk Maya 3d work AMD vs Intel

I want to build a 3d workstation
My budget 1200 $
Software Use: Maya, ZBrush, VRay, Nuke, Composite, After Effect, Photoshop.

Pro: AMD Phenom ll X6 3.3Ghz 1100T Black E... 9MBc
M/B: MSI-990FXA-GD80
RAM: Transcend 8GB
HDD: 1TB
Casing: Thermaltake Dokker
Power Supply: Thermaltake- 650W
PCI-EX: ATI Radeon HD 5870

Is it ok for 3d works or should I go for Intel Core i7???
 
I want to build a 3d workstation
My budget 1200 $
Software Use: Maya, ZBrush, VRay, Nuke, Composite, After Effect, Photoshop.

Pro: AMD Phenom ll X6 3.3Ghz 1100T Black E... 9MBc
M/B: MSI-990FXA-GD80
RAM: Transcend 8GB
HDD: 1TB
Casing: Thermaltake Dokker
Power Supply: Thermaltake- 650W
PCI-EX: ATI Radeon HD 5870

Is it ok for 3d works or should I go for Intel Core i7???