You should get the Intel System instead, even though it might not look quite as good on paper, the q9300 is far superior to the 9950 X4 and beats it in every test I have been able to find, except for memory bandwidth.
Also, another note about your most recent build, you may run into trouble with the phenom build using an "Intel Retail Cooler" because as far as I can remember, am2+ and 775 have different screw arrangements around the motherboard.
Personally, I would just build the thing yourself, its fun and saves you lots of money.