best overclocking C2D config !!!

i plan on buying the best cpu spec available
on air cooling with the lowest budget possible

if anybody sees something wrong in it, i would like to know

limit spec is 3.7ghz C2D architecture with 4mb total cache
( not looking at quads as they must be watercooled )

smallest CPU with 4mb cache is the 6320 7x266 = 1.86
to reach 3731mhz, it needs a fsb of 533mhz
so i need PC2-8500 1066mhz ram.

i need a board with a 533 mhz reliable support.
Asus P5K seems to be a good reliable one.

there i go with the hard questions. i have a 120MM Zalman 7700-CU
is it compatible with the P5K board... ???

optimisation question... at the same CPU frequency, will i get better performance using a higher fsb ?
example :
using 622*6= 3730mhz 1250mhz ram
instead of 533*7 = 3730mhz 1066mhz ram

what difference would it be to use 800mhz ( fsb400 )
and a 533mhz fsb on CPU (533x7)

compared to 1:1 spec with 1066mhz ddr2

Oops... double post.