ZBrushCentral

Photoshop CS5 Extended what would I gain from CS3 to aid in my production?

Hi all.

Its the last few hours of the offer from Adobe to get 30% off, and am very close to upgrading from CS3 to CS5 extended. I know it must have alot of changes since my version, but what in the area of 3D texturing and post work would I gain, does Zapplink with its Photoshop 3D work well, and if so how much does it help in production?

Thanks guys.