I moved to new house that has a lot larger listening room than my previous house. So, I retooled my system with the budget I had. I chose Polk Audio R700s for my speaker because they move a lot of air and have really deep base. Plus, they are easy on the ears, which is a plus for my tinnitus. I have bass traps and diffusers from GIK to treat my room, that made a huge difference. For cabling I have Oyaide Black Mamba on my server, Canare 4s11 speaker cables and on my McIntosh Integrated I will have a Hijiri Tukami. Yes, the Tukumi is twice as much as my speakers crazy I know. Anyway, I love this system!!!
Nice looking room and setup. Not sure what your entire room looks like, but I suggest absorption on the side walls to lower the first reflections. You could temporarily move the absorbers that are behind the speakers to test the improvement in imaging and clarity.