2 years ago I bought an OLED and at the time paired it with an LG SJ9 sound bar due to space constraints. Now I have a space that could easily hold any size 5.1 system so I'm looking to upgrade. Trying to keep the budget modest, let's say $2k (not firm). Any recommendations on where to start searching would be greatly appreciated. I'm not expecting top of the line equipment with this budget but I would like something that's a substantial improvement over the sound bar. Thanks!