I've had 2 different systems from Cyberpowerpc.com. The latest one I bought a year ago and with zero problems and runs FSX extremely well. I do suggest SSD for operating system and a SSD or VelociRaptor for FSX. I have the latter for FSX since higher capacity SSDs are quite expensive. One GTX 580 GPU does a great job in handling FSX as well.
JOE---- Asus P8Z68- V Pro; CPU: Intel i7-2600K 3.4ghz OC'd 4.6Ghz,
8G Corsair Dominator Platinum DDR3-1600, EVGA 780 GTX SC ACX Cooler, Creative Fatal1ty
Champion Series sound card, Samsung 840 Pro SSD 512G (W7 Ultimate 64), 3 WD VelociRaptor 1T drives, FSX/P3D/FS9/storage, 29" AOC IPS Monitor
2560x1080, 24" Asus VG248 @ 120Hz