Hi,
While i dont know thw specific price for the models u want, I can for sure tell you that the laptops definitely are cheaper in the US or even in dubai. Infact, ordering one online from US and getting it shipped here thus incurring shipping charges is still cheaper than buying it here.
Unless you are very particular about gulf specificatons ,arabic/english keyboard,it is better to get it from the US if u can...
..U can exchange/use dollar/euro here esp in the big stores.
No problems with customs for laptops..
Take care!!!