Processor Question for Gaming

[AussieGiant]

Hi Guy's,

I'm looking at purchasing a new machine.

The question is, do I go with the new architecture:

Intel® Core™ 2 Duo E6400 processor (2.13GHz, 1066MHz, 2MB cache)

or the older one?

Intel® Pentium® D Processor 950 Dual Core (3.40 GHz, 800 MHz FSB, 2x2 MB Cache)

What do you think fellas?

Comments and opinions would be greatly appreciated.