Ok, I need an honest, no BS assessment on how a Samsung q990d system will compare to a cheap 5.1 (or 7.1 etc) system.

I can get a q990d for $1400aud which includes rear speakers and a sub. Will connest with the samsung tv and its all just ready to go out of the box.

Surround sound setups range from free to $40,000... of course a well thought out setup will be better but I just want to hear the cars overtaking me when I watch Ford Vs Ferarri.

For the "sub 2k" price bracket. As a novice, how much am I leaving on the table really?