Re: Making computer from barebones, need opinion.
Go with 2x2GB of DDR2 800, you won't need the 1066 for the Q6600, and 2 extra gigs will be a bigger improvement.
And look for a HD 4850 over the 9800GTX if you can. It is faster for around the same price.
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.