IntroductionIt was the best of times, it was the worst of times... it was a fantastic time to build a new PC. Last spring, with DDR2 memory prices in the toilet and budget Micro-ATX motherboards around every corner, we showed you how to piece together a quality dual-core PC for under $550—peripherals, monitor and operating system included. Then, we took the next logical step, and for the first time in Buyers' Guide history, we told you how to build a rig with no compromises—a fast chip, an overclockable motherboard, a 1080p LCD screen and even a gaming-quality graphics card—for just...