I have a friend with the Border Patrol DAC. He brought it over to my system to compare with my Yggy which, at the time, was my primary DAC. The BP was much warmer sounding with a laid back presentation. I was actually surprised by how different they sounded since most DACs I’ve tried have a very similar tonal balance. I think in the right system, the BP could be a good choice, particularly for the money.
I’ve since upgraded to a Denafrips Terminator Plus (original Terminator first). These DACs have a very similar tonal balance to the Yggy but are much smoother with more detail and significantly better imaging.
I don’t have any experience with the ARC DACs.