If less than RM5k, Check out aatos or montiek.....sea gull is better but much more expensive and beyond your price range
Sent from my iPhone using Tapatalk
Thanks. Definitely will check for it.
Orient has a variety of pretty neat open heart watches at affordable prices. Here's one that fancies me:

Picture credit to Yeomanseiko.com
http://yeomanseiko.com/2014/12/09/orient-open-heart-db0c001b/
Thanks. I also checked Orient Star have some decent open heart piece.
One of the cheapeast "authentic" Tourbillon in the world
https://www.youtube.com/watch?v=lNma1pFHbvk
Thanks for the video. I will do more research on it, it was quite interesting.
<4k 
Good luck with that my friend 
That's why I mentioned it might sound silly, plus that price also apply for Open Heart design. Anyway thanks for the feedback. Cheers.
saw someone posted Sturhling Original in LYN, somewhere around USD800-900, China tourbillon
edited:
found it!
https://forum.lowyat.net/topic/3519114/+460
wrist shots on post #477
Haha thank Kenji, but too many negative feedback on that brand after I done some research. And the owner from LYN also said the time keeping accuracy was quite bad, so I will just skip it. Anyway we can't expect too much for that price. At the same time I saw the next page has another brand Ingersoll, will do some research afterward.
If I can't find any suitable design under my budget, I might as well skip this and move to my grail.

Anyway, I still wait for more recommendation. Have a good day guys, cheers.