ii) Yes, even if the laptop display don't have FHD, you can still connect the laptop to FHD external display and enjoy FHD resolution.
iii) 15" ultrabook line-up in Malaysia is a wash

i) You won't find FHD screen in 14", only HD+ (1600x900). FHD in 15", in Malaysia, can only be found among some heavy beast. There are plenty of FHD 13" laptop though

iv) 15" FHD laptop normally come with discrete GPU.
Asus
N56VZ-S4284H, i7-3630QM + Nvidia GT650M + (1920x1080) + Bluray@RM3699[2.7kg][B&O], 4GB, 1TB, W8; color: black
G55VW-S1216H, i7-3630QM +Nvidia GTX660M (2GB) + (1920x1080)@RM3999[3.78kg], 4GB, 1TB(5400rpm), W8
Dell
XPS 14, i5-3337U + Nvidia GT630M + 32GB mSATA+ 500GB(5400rpm) HDD + (1600x900)@RM3849[2.1kg], 4GB, backlit, spill resistant keyboard, W8
HP
Envy [Ultrabook] (Spectre) 14-3111TU, i5-3317U + Intel HD4000 + (1600x900 Radiance) + 128GB SSD@RM3999[1.8kg], 4GB
Lenovo
Y500, i7-3630QM + Nvidia GT750M(GDDR5) + (1920x1080)@RM2999, 8GB, 1TB, W8, red backlit, swappable ODD, 120w psu, 2 yrs
13" ultrabook with FHD:
Acer
Aspire S7-391-53314G12, i5-3317U + Intel HD4000 + 128GB SSD + (1920x1080; touch)@RM3799, 4GB, W8
Asus
UX31A-R4005H, i5-3317U + Intel HD4000 + 128GB SSD + (1920 x 1080)@RM3499[1.3kg], 4GB, W8
Dell
XPS13, i5-3337U + Intel HD4000 + 256GB SSD + (1920x1080)@RM4299[1.36kg], 8GB, W8, backlit
Prices are RSP, negotiable.
Basically if I seldom move from my table,it is okay to hook to external monitor and enjoy the full hd right?
my choice would be narrow down to XPS13/14,or lenovo Y500.which one of this would be a better pick?