what is your usage into? btw, your suggestions:

Apple
MacBookAir 13", i5-4250U + Intel HD5000 + 128GB SSD + (1440x900)@RM3299[1.35kg], 4GB, backlit keyboard, Mac OSX
MacBookAir 13", i5-4250U + Intel HD5000 + 256GB SSD + (1440x900)@RM3899[1.35kg], 4GB, backlit keyboard, Mac OSX

ASUS
UX31A-R4005H, i5-3317U + Intel HD4000 + 128GB SSD + (1920 x 1080)@RM3599[1.3kg], 4GB, W8

Sony
Vaio SVP13213SGS, i5-4200U + Intel HD4400 + 128GB SSD + (1920x1080)@RM3799[1.06kg], 4GB, W8SL

Lenovo
IdeaPad Yoga 13, i7-3537U + Intel HD4000 + 256GB SSD + (1600x900 IPS; touch)@RM3799[1.5kg], 4GB, W8, 2 years warranty

Dell
XPS13, i5-3337U + Intel HD4000 + 128GB SSD@RM3199[1.36kg], 4GB, W8, backlit

prices are RRP and negotiable.

requirements too demanding. either you have to sacrifice haswell, backlit keyboard and/or sleek design. by the way, your options :

Dell
Inspiron 14-3437, i3-4010U + Intel HD4400@RM1399[1.99kg], Ubuntu, 4GB, 750GB(5400rpm), 4-cell; W8SL@RM1549
Inspiron 14R, i3-4010U + Intel HD4400 + (1366x768;touch)@RM1988 [2.32kg], 4GB, 500GB(5400rpm), W8 , 6 cell
Inspiron 14R, i5-4200U + Nvidia GT740M@RM2049 [2.32kg], 4GB, 500GB(5400rpm), W8 , 6 cell
Inspiron 14R, i5-4200U + Nvidia GT740M + (1366x768, Touch) @RM2299 [2.32kg], 4GB, 500GB(5400rpm), W8 , 6 cell
Inspiron 15, i5-4200U + AMD HD8670M@RM1699, Ubuntu, 6GB, 750GB(5400rpm), 6-cell; W8SL@RM1899

Lenovo
G400s, i5-3230M + Nvidia GT720M@RM1899, 4GB, 1TB, W8
G500S, i5-3230M + Nvidia GT720M@RM1699, 4GB, 500GB, FreeDOS