I recommend silver with1%gold cable. It provides much better tonal balance, fuller sound with both extending of top to bottom. The sound stage is wider. More transparency, no congest sound like stock cable. But the cable is pricy. In my opinion, it is worth to invest in one shot to get best cable. I recommend to invest in cable first, just use it with iPhone first. You can buy better dac and amp later when you have more budget. This is from my own experience.