I agree with the other posters; the i5 2500k is very well suited for FSX. I highly recommend ordering any computer parts from Micro Center or picking them up from a local Micro Center store. Their prices beat any other site like New Egg and Tiger Direct. I recently upgraded my motherboard, processor, and RAM, and I paid $100 for a top Gigabyte motherboard, $180 for an i5 2500k, and $40 for 8GB of Ballistix RAM at Micro Center. I noticed a huge improvement over my old i7-950 processor, which was cooled with an H50 cooler (discontinued now) and overclocked to only 3.84ghz. Using that same cooler, I was able to overclock my new i5 2500k to 4.5ghz with no trouble. The i5 2500k is a very good processor for FSX, especially at only $180.