Best motherboard for Q6600/Q8200/E8400

Hi raybay,
Thnx for the reply.
One more thing i wanna discuss
I have two softwares installed, one is speedfan, and another is msi dual core centreWhen i observe the temps using both softwares i found some discrepencies among the results
speedfan shows temps of four cores, and the temps are 44,42,40,39c or cores 0 to 3 resp.
but the dual core centre shows even 5c lesser from the lowest temp shown by speedfan, however dual core centre shows only one temp.
Even in load, the temp diff remains as it is.
So which reading should i take as correct?

One more question; what is the time duartion after which the thermal paste layer on cpu/gpu should be added/relayered, and how it makes impact on heat generation.

Another question, in which direction cpu fan revolves, imean intake or exhaust.
the northbridge and south bridge chips don't have active cooling, so they are getting heated enough, what should i do regarding this.

MSI dual core centre has a dynamic overclocking technology button(dot), it automatically changes the fsb speed/fanspeed to give best output on cpu load, even in no load condition it slows down the fsb+fanspeed (even less than 1000 rpm).
So should i enable the dot always, i mean, can it make harm to cpu/mobo.
Thnx in advance.
Regards,
Debojit