REX on a laptop

[CapitalBill]

I'm a am getting a laptop here are the specs

Windows 7 Home Premium 64-bit
3rd generation Intel(R) Core(TM) i5-3210M Processor (2.5 GHz with Turbo Boost up to 3.1 GHz)
NVIDIA(R) GeForce(R) GT 650M Graphics with 2GB GDDR 5 video memory
8GB DDR3 System Memory (2 Dimm)
$20 OFF Microsoft(R) Office Home and Student 2010
FREE Upgrade to 750GB 5400RPM Hard Drive
NO mSSD Hard Drive Acceleration Cache
No additional security software
6 Cell Lithium Ion Battery - Up to 6.0 hours of battery life +++(will be plugged in 90percent of the time)

What kind of performance hit will I get and does the scenery sliders need to be maxed out for best results. I like Rex because of the the airport textures Is there any other payware that does that and It would be good if it you customize airport textures like REX.