not a good practice to not have a budget when buying phones bro, since there are so many options.
If you are looking for Windows phone, even the cheap RM500 ones performs very well, as it is a very efficient OS. So when you don't state a budget it's hard for us to recommend bro. Of course the more expensive models are better than the cheap ones..

probably in a month or two, when Windows 10 for phone is ready. but a new flagship will guarantee to go above your 1k budget, the old flagship Lumia 930 is still 1.5k.

for a 1k budget, you can get 640 XL LTE, or Lumia 735 LTE

the 640XL has better camera, bigger screen and better battery than 830, not to mention it's a 4th generation model compared to 830 being a 3rd generation model. the 640 XL only lacks wireless charging compare to 830

735's specs is almost the same as 830 except for the camera, overall the 640XL should be a better buy.

- Windows 10 integration with PC, your browser, user account and all sorts of settings can sync up make it very convenient
- Continuum: https://www.youtube.com/watch?v=Sc1efHpPIVo

If you don't care about that, Lumia 535 is available for less than RM500 now, if you want a 720p HD screen, Lumia 540 is between RM500-600. These phones can also upgrade to Windows 10 later, just that their hardware not powerful enough to do Continuum