Among your usage, only illustrator need that kind of power. And if you want to run illustrator really smooth, should aim for more RAM (8GB), and get a SSD (256G ~ RM600).
Don't be restricted by the HDD capacity. Prices difference between 1TB, 750GB, 500GB are minimal.
Acer
V5-473PG-54204G50, i5-4200U + Nvidia GT740M +(1366x768;touch)@RM2299, 4GB, 500GB,W8 *no OD
V5-573PG-74504G50r, i5-4200U + Nvidia GT750M + (1366x768; touch)@RM2899, 4GB, 500GB, W8
Asus
K46CB-WX060H, i5-3337U + Nvidia GT740M@RM2199[2kg], 2GB, 750GB, W8, 4-cell, OD
S550CB-CJ102H i5-3337U + Nvidia GT740M + 24GB mSATA + 500GB + (1366x768; touch)@RM2499[1.83kg], 4GB, W8
S551LB-CJ120H, i5-4200U + Nvidia GT740M@RM2699[2.4kg], 4GB, 750GB, W8, 3-cell
N56VB-S3070H, i5-3230M + Nvidia GT740M@RM2899[/b][2.7kg][B&O], 4GB, 750GB, W8
N550LF-CK064H, i5-4200U + Nvidia GT740M + (1366x768; touch)@RM3099[2.6kg], 4GB, 750GB
Dell
Inspiron 14R, i5-4200U + Nvidia GT740M@RM1849 [2.32kg], 4GB, 500GB(5400rpm), Linux, 6 cell; W8@RM2049
Inspiron 14R, i7-4500U + Nvidia GT750M (GDDR5) @RM2499[2.32kg], 8GB, 1TB(5400rpm), Ubuntu 12.04 , 6 cell; W8SL@RM2699
HP
Pavilion 14-N059TX, i5-4200U + Nvidia GT740M@RM2099[2.03kg], 4GB, 750GB, W8
Lenovo
Y410p, i7-4700MQ + GT750M(GDDR5)@RM2899, 8GB, 1TB, W8, red backlit, 120w psu, swappable ODD, 2 years warranty
Z400 touch, i5-3230M + Nvidia GT740M + (1366x768, touch)@RM2199, 4GB, 1TB, W8; 2 years warranty
Z500, i5-3230M + Nvidia GT740M@RM2299[2.2kg], 4GB, 1TB, backlit, W8; 2 years warranty
Z510T, i5-4200U + Nvidia GT740M + (1366x768, touch)@RM2599[2.2kg], 4GB, 1TB, backlit, W8; 2 yrs
MSI
GE60-2OC, i5-4200M + Nvidia GT750M(GDDR5) + (1920x1080; anti-glare)@RM3099,8GB, 750GB(7200rpm), W8, steel series KB
Sony
Vaio SVF14218SGW, i5-3337U + Nvidia GT740M@RM2399[2.4kg], 4GB, 500GB, W8SL
Toshiba
Satellite L40-AS109Xb/G/W, i5-3337U + Nvidia GT740M@RM2199[Onkyo], 4GB, 750GB, 3 years local warranty
Satelite L40-AS125XG/B/W, i5-4200U + Nvidia GT740M@RM2299, 2GB, 750GB, W8
Satellite L50-A100X/XW, i5-3230M + Nvidia GT740M@RM2199[Onkyo], 4GB, 750GB, W8SL; 3 years local warranty
Satelite L50-A107X/XW, i5-4200U + Nvidia GT740M@RM2499, 4GB, 1TB, W8
Prices are RSP, negotiable.
Sony Vaio? Look nice

many thanks for the recommendations..
among these models, would you know which has better battery life, quieter fan, cooler and better wifi signal ?