Please read about Samsung Q990B disconnect issue. There is a group of Q990B owners on Facebook. You can join that as well.
Sonos arc with surround speakers and subwoofer would cost double. Under 1 lakh you would only get the Sonos arc soundbar (no sub or surrounds). So, Q990B would provide better overall experience under 1 lakh.
I strongly recommend you check Croma offers for Samsung soundbar purchase.
Other options
Samsung 950A -
- has a little less powerful subwoofer
- has fabric on soundbar and surround speakers
- has display on top of soundbar which is inconvenient
- does not have disconnect issue like 990B
- was available for Rs 64,000 in Croma in September/October 2022.
990C has been showcased in CES 2023