Might as well post an update on this exercise. I got the new gaming desk and pedals and everything migrated over to them, then got the existing desk and pedals setup with the new XP system and my old, backup controllers.
The XP system paused on NASCAR Racing 2003 Season. Every setting in the game is maxed and I've got 8x AA with 16x Anisotropic enabled in Nvidia's control panel. The worst frame rates I've seen so far are around mid 90's. I probably will need to replace a hall sensor on the pedals, the clutch is not working quite right. The steering wheel supports 900° rotation, but I've got it set for 540° for comfort. It works well in DOSBox with 360° rotation, but there's no centering spring force so its a bit awkward. I might stick with the old P3 system for DOS games.
The "modern" system, with the new desk and pedals. Primarily for iRacing and American Truck Simulator. The fourth monitor is for real-time scoring.
Hydraulic brake pedal is amazing. Downside is they require shoes for comfortable use.
Tualatin Celeron 1.4, ASUS P2B, 512 MB, GeForce 3 Ti 200, Voodoo2 SLI, AWE64, WD 80GB SE HDD, Dell 2007FP