@ryder I bought the Aurender N150. You’ve identified many of your issues. I’d recommend a good power cable as well as a good power strip. And give it lots of listening time burn-in. I could clearly hear changes to 100 hours and more subtle changes far past that.
I use a Shunyata Taipan power cable that I had available. I have it plugged directly into my Shunyata Hydra power conditioner. If you need a good power strip I highly recommend the Furutech TP-66 gold or rhodium versions. Any high quality power strip will be an improvement.