but is there anything out there that will keep my midrange/mid-bass/bass and improve upon the highs?
So, I have the Acoustic Zen Silver Reference ll interconnects and they offer the sound characteristics you’re looking for. They won’t shortchange you in the bass or mids, which is surprising for mostly silver interconnects, but they will likely give just a bit more in the highs but without going too far and never harsh sounding. What may be even better, and much cheaper because they’re used, is this used pair of AZ Absolute Silver interconnects that were at the top of the AZ line and at $750 are less than half their $2000 original MSRP. My strong recommendation would be to give them a try, and if they don’t blow you away just turn around and sell them for little/no loss as AZ cables have a very fluid used market and are always in demand. Hey, if they work for you you’ll save a bundle of $$$ with very little risk involved. Best of luck.
https://www.usaudiomart.com/details/649955854-acoustic-zen-absolute-silver-one-meter-xlr/