I set up an LG sound bar with sub a few months ago and it was better than I had expected. Still not great, but for someone who wanted to keep the TV/Audio simple, it was decent. The speakers & sub are amplified and connect via BT, which worked the second time- the sub wouldn't connect at all, so they replaced it.
For these prices, I would create a separate room for a stand-alone system that doesn't receive ANY input from an interior detonator, regardless of how good they tell people they are.