HW-Q750C

I'm personally not a fan of LG sound bars. I was looking on Woot and you can get a new Samsung Q750F 5.1.2 sound bar for $500. I think this would be the best you can get for the budget. I am also in an apartment as well, and having wireless rear speakers is nice for the surround effect. However, with the rear surrounds they can distribute ambient effects and directional audio away from the front channels. That lets the center channel handle dialog more cleanly, without being crowded by all the other elements in the mix. So if you have to listen at a low volume, you can do so and still be able to hear conversations without it being crowded by everything else.

B-750f with rears is sweet, got it all for under $300

Just picked up a Samsung HWB750F from visions. It's 50% off right now

If you get a Samsung 600,700 or 800 series you can add the rear speakers on at a later date for a couple of hundred bucks and then you have 80% the effect of the 900 series for 1/3 the price

Get the Sonos system. Samsung is terrible at support. Further you can buy the Sonos components from Costco. At least most of them. Return policy is quite generous as you probably know. Don’t be tempted by the Samsung pricing. It’s just not as good or reliable as the Sonos systems. He’ll even the JBL soundbar systems have better sound than the Q series.