Agree with Ripper, once you Mac you can't go Back.
But don't buy a Mac from SL, the premium is just criminal. It would be cheaper for you to get an Air Asia ticket to Singapore or wherever in the region it is cheapest. Got mine through a friend in the US, who got it from an Apple Store during a sale, so got a hefty discount and payed less than a similar spec Dell/HP/Whatever. Totally satisfied.
There are also the factory refurbished ones that are available through Apple online or authorised dealers in the states. Not sure how the warranty works, but there is a huge cost saving there for what is essentially a brand new machine twice over. And I do recommend the 3 year apple care.