Originally Posted by Raggi_Thor
... As much as you can afford :-) ...
Since you have specified these separately, I assume you will assemble your own system.
What I do, with somewhat limited money, is to research motherboards on someone like mwave.com that does bundles of board/memory/processor. Then I look at tomshardware.com for motherboard reviews. Then I sort of plot processor speed / cost and memory speed/cost and buy last years top system at about 30 to 40 percent less cost than the top this year. Usually there is 10 to 20% performance difference, and 30 to 40% cost difference.
Video Cards are real expensive at the high end.. again, last years hotshots with this years low-cost equivalent can save a lot. Do you really need 3-d motion images?
Take a little swig of coffee and aim a bit below the top...