For a cpu, I choose the 740 BE with the arctic cooling cooler. I'm going to use Crossfire'd 5750's. With 800gb green caviar hard drive.
Now, I don't know what motherboard to use. I'd like to try to unlock the 4th core on the cpu, but if I can't, hopefully I would like to oc it to around 3.5GHz without voltage tweaks. I would also like the latest 800 series chipsets so I won't have to upgrade until 2011 Christmas
My budget is capped at 150 for the motherboard, nothing over please!
Also, what ram do you recommend? I heard you need 'AMD approved' ram in order to oc it on certain boards or something. My budget cap for ram is 100$.
The board you linked to is fine. I would personally have selected a similar board from Asus, MSI or Gigabyte. With a BE CPU you can overclock with out affecting the ram speed but I have seen the AMD approved ram statement proved wrong many times.