(Nearly all parts, in your post as of this post, are identical to their parts except for their special requests.) <More drive space, Crossfire in future, smaller than mid-tower case, CPU cooler due to smaller case usage, fans due to smaller case usage, 2nd burner.>
I would stick with your original DDR2 1066 RAM. The built-in RAM controllers on AMD CPU's benefit from the extra speed. That Patriot RAM is OK, but needs 2.1v to get 4-4-4-12 timings at DDR2 800 speed. That pretty much means it's just overclocked DDR2 667 RAM. Real DDR2 800 RAM will run around the 1.8v DDR2 standard voltage.