I recently purchased a Mac Pro 1,1 BTO 3.0 Xenon Dual Core 5160 and thus far have upgraded the memory to 10 MB, added a 1 TG HD. a XFX ATI Radeon HD 6870 and installed Lion 10.7.3. For most applications, I find the computer more than adequate, impressive in fact... however gaming is a different situation and would appreciate some advice. I am considering one of the following options, 1) upgrade the processors to X5365's, 2) upgrade the graphics card up a notch or 3) hold, use the computer as is for a year or so and purchase a new, (or newer) Mac Pro down the road. Current performance indicators: CINEBENCH 11.5 OPEN GL 29.75 fps CPU 5160 3.27 GEEKBENCH 6944 This particular machine is excellent shape and runs exceptionally quiet even with the fan of the 6850 being heard more than the others. Appreciate any comments or suggestions that you may have. Thanks!