Planning to upgrade my computer

I'm planning to upgrade my computer from C2Q to i7 in the quest of getting smoothly running FSX. I'm using lots of 3rd party addons like PMDG/LVLD/leonardo planes, RC4, Traffic X and FSGenesis meshes, which dont really help getting better performance. I'm getting kinda OK performance currently in 2D cockpits, but I'm also considering getting TrackIR 4 and moving to 3D ones and that doesn't really help FSX run any smoother.My current system is following:Q9450 OCed @ 3.2GHzAbit IXQuadGT motherboard4*1GB G.Skill 800MHz memsGTX280Zalman ZM850-HP PSUFSX running on cheap&big(&slow) HD32bit XPUpgraded hardware would be:i7 950 (OCed as high as it goes)Scythe Mugen 2 CPU CoolerA-Data 6GB Tri-Channel kit, DDR3 1600MHz (PC3-12800) memsAsus P6T motherboard150GB WD Velociraptor, SATAII, 10000rpm, 16MB HD, dedicated to FSX onlyTrackIR 4 Pro64bit Vista UltimateAny suggestions or comments of my plan? I'm not familiar with i7 so I dont really know what kind of performance increase to expect and therefore if its even worth upgrading. Anything i should know about OCing that 950? Thanks in advance for your help.