I'm going to go along with Bruno - get a Toshiba Qosmio X70-AST3G26 laptop.
*If you order it today you can save yourself $950.*If not, you still get a great laptop. it's just going to cost you $2,700.
This laptop, or one with the same setup, will not only work with
FSX, but also with
Prepar3d when it moves over to 64bit.
Laptop summaryIntel® Core™ i7-4700MQ Processor
Windows 8.1
32GB DDR3L 1600MHz memory
3GB GDDR5 NVIDIA® GTX770M with Optimus™ Technology
2.75TB (total):
256GB Solid State Drive (mSATA, SSD)
+ 1.0TB (5400 RPM, Serial ATA) + 1.5TB (5400 RPM, Serial ATA)Blu-ray Disc™ Rewriteable (BD-RE) and DVD SuperMulti drive
FHD TruBrite® TFT LED Backlit Display with Intel® Wireless Display Technology
Intel® Dual-Band Wireless-N 7260 2x2 AC + Bluetooth® 4.0
Premium Frameless LED Backlit Raised Tile Keyboard with 10-Keypad (black)
Starting at 7.6 lbs
Alternately, you can use it as a guide to pick another laptop.
Personally, I wouldn't like a backlit keyboard. But then, I came over on the Mayflower.