How many CPU cores for AE?

Hi,

A little advice, please.

I need a new PC ASAP, so can’t wait and save more money. I need it primarily for After Effects CS5.

If I can only afford 8gb RAM, but have the choice of a six core or eight core AMD, which should I get, please? (For example, is it a waste getting eight core with only 8gb RAM?)

Here are my options:

AMD 6300

AMD 6350

AMD 8320

They’re all roughly the same price because of the other components, e.g. brand of motherboard, size of HDD, quality of graphics card, etc.

I don't go mad with AE - I don't render 1000s of layers of various formats with 100s of effects. My AE projects are quite small and modest.

Thanks for any help,

Steve