I believe the Philips model isn't a HDR TV .

Philips doesn't care about their 4k TV market in Malaysia very much , that's why their TVs are often excluded from recommendation  . Especially when this particular model is from last year , I don't know if they ever plan to bring their 2018 models to MY especially when they put most of their TV priority in the Europe market .
4k HDR-TVs in this price range show very little difference than SDR but it is nice to still have that option .
Only the #2 , #3 , #4 from your list are tagged as a 4K HDR TV .
The Sharp is VA TV but it doesn't has any M.I or BFI features , which means it isn't very ideal for watching movies since you will have no way to smooth out the judders from 24p movies on a 60 hz TV . However . not everyone will notice the judders .

The LG model is one of the brand's infamous RGBW TV , which you should avoid buying despite being a little bit cheaper .

Overall , the Sony model has the most complete set of features among the 4 at a slightly higher price tag.
Beside that ,  the first thing to decide when you are buying TVs is to determine your room condition , go with IPS for brighter & larger room , VA if your room is dark / dimmer .

I believe the Philips model isn't a HDR TV .

Philips doesn't care about their 4k TV market in Malaysia very much , that's why their TVs are often excluded from recommendation  . Especially when this particular model is from last year , I don't know if they ever plan to bring their 2018 models to MY especially when they put most of their TV priority in the Europe market .
4k HDR-TVs in this price range show very little difference than SDR but it is nice to still have that option .
Only the #2 , #3 , #4 from your list are tagged as a 4K HDR TV .
The Sharp is VA TV but it doesn't has any M.I or BFI features , which means it isn't very ideal for watching movies since you will have no way to smooth out the judders from 24p movies on a 60 hz TV . However . not everyone will notice the judders .

The LG model is one of the brand's infamous RGBW TV , which you should avoid buying despite being a little bit cheaper .

Overall , the Sony model has the most complete set of features among the 4 at a slightly higher price tag.
Beside that ,  the first thing to decide when you are buying TVs is to determine your room condition , go with IPS for brighter & larger room , VA if your room is dark / dimmer .

Which sony model is that, Sony KD49X7000F?

I really doubt that , unless the shop owner lets you calibrate both of the TV for a side by side comparison . Beside that , any difference you see might as well be the result of different TV settings . TV shops are usually well-lit , which makes it really difficult to judge on picture quality as well.

That's why all these IPS TV look really incredible good in shop .

So in conclusion , despite of what most people telling you go to the shop , trust your eyes , blah blah blah ....  what we can actually see in the shop is very limited . It is crucial to keep your expectation in check , have the basic knowledge so you don't swayed by the salesman and end up buying an entirely different TV when it is sent to you home .

You are looking for a living room TV , so getting an IPS TV seems more ideal .
In your case ,  only the LG & Sony models are of IPS screen ,  since you have already eliminated the LG out of the two it is only logical to get the Sony one.
***I am 95% sure the Philips model of this size has a VA panel but I can still be wrong
As a ex - plasma owner , I find it really hard to adapt to the LED-LCD TV .
Most modern LED-LCDs simply can't compete with the black levels , the viewing angles and the motion clarity of Plasma .
That's why long after the death of Plasmas , some AV enthusiast are still holding onto their trustworthy Kuro  :thumbsup: 
Theoretically , only the OLEDs can provide meaningful upgrades to your previous plasma but it is far more expensive than your budget allows and not available in the smaller size (<55")
On the bright side ( literally ) , modern TVs are far brighter than Plasmas and provide massive resolution upgrade to 4k and upcoming 8k , along with HDR & accessibility with most of the basic 4k streaming platforms such as Youtube , Amazon prime videos, Netflix . The HDR is also the hot topic in town so you should spend some times reading onto that  .

Start by learning the pro & cons from LED-LCD types ( VA vs IPS )  and learn how practical these advantages can apply to your room.
For eg ,  if you are buying a fairly large TV for smaller personal room , the wider viewing angles will be very  useful to you.

Then look for the prices of the models and see which brands can suit your personal need best.