I was shocked at how good the Q90R 7.1 soundbar was compared to my older Denon+Polk 5.1 system. While my old system had more rumble (12" subwoofer)... having a 'wireless' 7.1 Atomos system makes up for it. (The Q90r subwoofer isn't horrible, it just doesn't move as much air like my old larger one)

I would check the reviews on RTINGS.com and DigitalTrends (they have youtube channels and websites).

The top of my list right now would be:
Samsung Q950T
LG SN11RG