Although it is double the price, there is the DX240 which is the exact same form factor, with different DAC chips. Or, if you like the current sound of the DX160 the best, you could try the DX170 (the DX160 successor). It appears to be the same device, but with fixed hardware (WiFi, & BT, and upgraded CPU, though still a RockChip, to name a few).I have been using DX160 for several years on a daily basis, for the form factor you are hard pressed to find another DAP that has a better sound quality. The battery is decreasing but for my purpose, it is fine since only use it for around 2 hours each time.
However, I have the frozen screen upon startup more frequently. Now I have about 1/3 to even 1/2 of the times when I switched DX160 on, I have a frozen screen, and I have hard restart to make it work. It becoming very annoying and I am starting to look a replacement for DX160.
I am a huge fan of the DX160, but I will probably pass on the DX170. It is like $100 more for the exact same device, but with a (still) slow CPU upgrade, and fixed issues that are what the DX160 should have been to begin with. For sound alone, I know it will sound fantastic, and I suppose I am being nitpick(y) here though. Who knows what products will be available by the time my DX160 takes a crap. I will probably get something around the same size though, because the DX300 is brilliant, but sometimes I just want something a bit smaller to carry around.