I think you have a very nice, well thought out system and it's because of that I find your quest for more "detail" puzzling. Based upon my experience and what I've read of your components none of them would be described as highly detailed in their musical presentation. IMO trying to change a system's presentation with cabling is fundamentally wrong. It's also a poor value solution. I'm not saying that it can't work, but even if it does it will impede any further improvements in the future.
Before making any changes I would recommend you experiment with speaker placement and acoustic treatments. I believe that in a large room getting the bass right (which probably will sound a little light weight, at least initially) is essential to maximizing resolution and detail higher up the frequency spectrum.
Before making any changes I would recommend you experiment with speaker placement and acoustic treatments. I believe that in a large room getting the bass right (which probably will sound a little light weight, at least initially) is essential to maximizing resolution and detail higher up the frequency spectrum.