..an' I gave up FS9 one year after FSX came in, and have never regretted it - except that there are no developers with the equivalent talent to the FT guys in FSX. I fly pretty much only the OrbX PNW and NR and related sceneries now, and sorely miss FlyTampa's San Diego and Seattle. I fly the with XPax, ASE, RC4 using the Leonardo Maddog, ASE and Cargo Pilot with the Milviz Cessna 310, VFR - the SibWings BirdDog, plus I occasionally play with the A2A Cub and Spitfire 1B - mostly in the Renton/KORS/Darrington/Concrete areas, with a few flights a week around Portland.
To get the best out of FSX requires are brute of a machine, and we now have that in the i7 series. It still needs tweaking here and there, but that 2600K i7 will yield a sim that has heavy weather, automobiles, lots of air traffic, strong ground detail, with sufficient leeway to still run the Maddog at 30 frames without struggling.
I took an IQ test and the results were negative....
Water-cooled i7-2600K @ 4.9 gig, ASUS P8P67 B3 Dx; EVGA GTX580; 8-gig Corsair Vgnc C8; W7-64; TH2G w/3x19" VA926; Homebuilt airliner yoke/ pedals; 6-pack throttle quadrant; TrackIR5;