Is true that the space is a not exactly sound friendly. Then again, most of us have our own challenges in this space. We find ways to get around the problem over time. You're not going to get anywhere rushing into this so take it slow.So I am now confused and not sure how and what I can get.
You can fill that room with good sound for sure. The problem is you will have a lot of clutter when you head down the path of Home Theater. You don't want to ruin a space filling it up with speakers.
If those active options are a bit pricey, get a cheaper passive option. Something like a KEF Q950 paired with a Denon PMA-900HNE. This is just one option. There are hundreds of combinations possible with different brands. KEF/Denon's are sort of easy as they are sold under one roof, that is Pro Fx. Not the best of dealers to strike a bargain but its not always about getting a bargain. Atleast, not for me.