I have owned some really good $3-5,000 players, IMO, the majority of people buying the CDT don’t usually have the budget for a quality dac and cables, but a quality coax and PC transformed my 6000 into a very high value performer; of course the amp and speakers need to be good enough to hear the improvements. I no longer buy silly expensive heavily advertised/reviewed cables, or their entry level offerings. I buy from Ali-Express, specifically from DIY Hi-Fi. I am very fond of their Nordost Knockoffs (wish they called them something else like Neardost...), specifically the Odin Gold range of PCs, interconnects and Coax. I replaced both the coax and PC for less than the price of an entry level cable from any of the highly advertised and considerably more expensive cables
FYI, if you check you can find the CDT for <$400 slightly used, most likely because they did not buy high quality cables for it
hth