Buying a new pc and got a choice of 2 processors;

Pentium 820 D Dual Core 2.8ghz 2x 1mb cache 800mhz

or

Pentium 4 640 HyperThread 3.2ghz 2mb cache 800mhz

Pentium 4 is £25 more which is suprising

Been told that the dual core is obviously better for multitasking but the pentium 4 might be better for games which i do play a few.

Thoughts ?

Need to decide by 3 o'clock