Get a better amp/dac, seriously. Regardless of what people say, as far as I can tell, none of these cable purchasing members set up blind testing. Without blind testing I don't care if the poster has 25 000 posts and owns every expensive headphone and amp on the planet. You need blind testing that is done correctly to make any determination as expectation bias is extremely strong, and everybody is equally subject to it's effects, no exceptions, none. Now I just spent $500 Canadian for an amazing cable to be made, but I did that for other reasons and to this day I make zero claims about sound quality as I have been unable to do any blind testing therefore any impressions I have are very biased and can't be confirmed. Sorry, I love this community, and the quality and caliber of members here is exceptional; however, the trust me I know I can hear the difference position on cables is simply just opinion.
For the record, I am on the fence about cables, I hope the big investment I made matters, I really do, and I don't see why cables can't have some positive impact on sound quality. Without evidence that stands up to the standards of scientific inquiry, claims need to be taken very carefully. And that goes for any gear. If there isn't a technical advantage/innovation in the gear that can reasonably be expected to yield positive sound quality gains, and be blind tested, then I remain equally skeptical of course.