Overclocking Q6600

Hi all
I have some questions:
I would Overclock Q6600 (from a pc hp a6295)
Graphics card: HD 4870 512mb
For the occasion, on my proposed as cm: asus p5q pro. So I want to for my processor, the best would be to DDR3 or DDR2? (if DDR3, what motherboard?)
After, I look for a good box (for box hp lol) Then for cooling air or Watercooling?


Here I want to Overclock the processor and the Graphics card a fond (in any security lol)

For the overclock, closer to Gigabyte, the EP45-UD3R who tears well:) But at Asus is not bad either. DDR2 @ 1066MHz either the PC8500 G. Skill from home or another brand that has good chips rams.Take the high end for overclock.

For the box, it depends on your budget, it has everything. Cooler Master, Lian Antec.. Good brands: Cooler Master,Avoid or simply noname boxes.For cooling, the aircooling prefer, but a good, kind or even IFX14 Noctua for Proco because the Q6600 like heat. And a GFX Chilla or Scythe Musashi for the HD4870. The Watercooling is very expensive!

for cooling Zalman there are also 9700 and 9500LED are huge cooling: They are well for finely engraved, but I can tell you they are struggling to cool a Q6600 overclocked to have tried. when I think my vCore is at 1.60 volts in bios that with 30 degrees temperature with a Zalman 9500LED