Streakeagle, I saw your post from last month - your installation is fantastic!
Nothing anywhere near that dedicated for me as my desktop PC (i5-3450 CPU @ 3.10 GHz) is used for a variety of tasks. My flight hardware is pretty basic with an old CH Products 568 CombatStick (since FE2 is mostly "blip switch" oriented, that's about all I need), and an even older set of CH ProPedals. I occasionally visit some of the online purchase sights for a deal on a ProThrottle, but not sure I really want one.
PCPilot, If you're primarily interested in simulating GA aircraft (although I guess you could also use it for a P-38 Lightning), wouldn't you also want a yoke in addition to your stick? The CombatStick grip and buttons arrangement is similar to that found in both the CH-47 and SH-2, but not a Cessna (unless it's a Model 318!).