If you like what you get from the Analysis Plus Solo Crystal Ovals Interconnect, why not explore Analysis speaker cable? Many good things have been said about them in reviews.
I would also jump on the band wagon to say there is nothing wrong with Nordost but, in your case I feel it's a mismatch to your speakers and amp combination.
What would possibly be my number one pick might also offer you greater synergy and a move toward a smoother, more lush musicality, just a tad less audiophile, without a loose of your fine detail and air... I would offer the newer Audience Au24 (e) Speaker Cable and would suggest that their interconnect cables included in the loom would have merit as well. It's always a tricky thing to settle on the fine tuning of a system synergy with cabling, as few of us have the opportunity or resources to taste test a wide sample of brands, at home, for a long enough period to digest the results with long term listening.
I wish you the best in your journey as you have an amazing kit already.
Happy Listening!