Wow! What a modern, pretty looking space! No way I would put any big ugly boxes around that TV, so the next best thing, besides in walls, would be on-walls. Do some looking around, maybe PM Matt (MTG90) or Ryan (Tux) and see if they might be willing to help you design and build a high quality on-wall trio of your from L+C+R speakers. You do have the possibility of doing any of the Seos line mounted flush with the wall, but, they may take up too much wall space or have to low of a WAF.
You could DIY a really nice three way on-wall using either high efficiency speakers or more traditional speakers. It really all depends on your listening habits and how large your room is.
If you watch mostly movies at high or near reference level volume, then I would personally recommend a Beyma TPL-150 and two AE TD10's in an MTM configuration flush mounted to the wall, or if your listening habits involve more music in addition to movies and would rather have a fairly attractive on-wall speaker, you could build a RAAL tweeter crossing over to a single Seas or ScanSpeak mid, and then they would hang off everything below 300hz to a single, (or possibly double), Scan Speak Revelator(s).
Sorry for all of the fantasy talk! I just love the initial stages of speaker selection!