where to get rm1549?
I saw their website selling 1988

No extensive reviews yet, at least not to my knowledge haha
Maybe God_lee_what2004 sifu will know since he lurk not only on English sites 
Pretty funny la the scarcity of reviews considering its a damn hot product 

I think you probably will want a FHD screen (1920x1080), a good screen panel (IPS) with proper colour calibration?
For professional video editing, you actually need a pretty good CPU + GPU combo, a SSD (so that video files load up and save fast).
In addition, you are looking for light and slim 

Raymond actually point you to the right brand, but maybe you should ask Prince J (he is from illegear) when is the RE-13 going to be released? 
https://forum.lowyat.net/topic/2613184
www.illegear.com
RE-13 will have 13" FHD screen, matte screen, IPS panel (you could customise and opt for 95% NTSC gamut panel if you want), illegear provide professional colour calibration, and the CPU+GPU will be powerful enough for your video editing jobs (gaming for you is just a "side effect" ). And you could customise the machine with 256 or 512G of SSD (which make boot up and app / files open and save so much faster). If you are in Klang Valley or certain cities in Malaysia, illegear also provide on site warranty service (good for peace of mind).
All in, should be around your budget.
And oh, if you are interested, illegear could paint the laptop shell with some amazing colour 

Whats means by free dos? I new on these stuffs 

i changed the hardware on the desktop before, need to call microsoft to activate it, but i dont know if it work transferring from desktop to notebook

ok good question, how to check? mine was the upgrade version of Windows 7.

hmm.. i5 should be more than enough, i think. Was hoping there's an 'ultrabook' with dedicated graphics too, so can do a bit of gaming.
Guess wanting the best of both worlds is not too much at this point. haha.
light, dedicated gfx, 15", ssd, FHD. possible, without breaking the bank?

You can only find FHD in 15" or 13".
I've listed ALL the 15" FHD available in Malaysia that are within your budget.
And 13" FHD model don't have dedicated GPU.

i remember Asus zenbook do have , with dedicated GPU somemore, but i not very sure, that model seem like not available in Malaysia

Pros : Steelseries keyboard, 4 Dynaudio speakers, Thin, sleek and light, cool looking keyboard texts and 3 zone colour illuminated, dual cooling system.
Cons : Poor heat dissipation due to thin design.

thanks for the correction.
one of the reseller told me that it has 4 speakers that blasting in front of the keyboard.  

im just bought yoga 11 and is ARM RT. i want to install IBM SPSS but its not compatible with it. its possible to change the RT to x86? any idea?

it cant be format to other os? i read yoga 11s same as yoga 11 except for the os only. am i correct?