So far we have completed the easy parts of choosing our DIY system. It gets more complex after this. In the next installment of this three-part series, we look at some of the most controversial issues you will deal with when building your ultimate machine on a budget. Specifically, performance RAM is becoming scarce, so you had better choose wisely. We'll also recommend a graphics card with blazing performance at an astonishingly low cost. Finally, we'll examine high-efficiency power supplies, fast storage drives and more. Stay tuned for Part 2.