Anyway, it is end November now, and I think I will wait for Xmas or New year offers from Amazon to go for a sound bar.!
As I was expecting, there are no year-end offers from Amazon, so postponing my purchase plan to next year.
Further, I was advised by a close friend whose finding is as under:
If we buy an AVR, then we can connect existing speakers to it and enjoy 5.1 surround sound but cannot enjoy Dolby Atmos since I don't have an Atmos supporting speaker.
So, the question is whether to go for a soundbar with Dolby Atmos surround feature (
JBL BAR 500 pro - Rs.42,999 or
Phillips TAB8967 7.1ch - Rs.39,999 or ...) and enjoy Atmos feature (though not many TV channels are broadcasting Atmos sound content now but having an advanced feature will help for future requirements).
If I buy an AVR, say Denon x580BT at Rs.34,900 and connect my existing 5.1 speakers without any possibility of Atmos sound system. In this case, I will be paying extra Rs. 5099 if opt for Phillips or Rs.8099 if I go for JBL, but I get all new speakers, soundbar with wireless and Bluetooth features.
Anyway, I have some more time to take a decision.!