[BEM-S4]

That Rocketfish product works pretty well, for what it is. The main issue you're going to run into though is the gear you have wasn't designed to work well for what you're trying to do. TBH, and I know this isn't what you want to hear, is that stuff you have still new enough that you could return it? Since you're not looking for audiophile sound but basically want easiest surround setup, converting to Sonos sound bar, wireless sub, and a pair of P1s for surrounds will do everything you want VERY easily. I have that setup in my bedroom and it's more than fine. And this is coming from someone who is used to $20K+ budgets for proper theater installs.