@yyzsantabarbara that is a tough answer for me largely because I have never lived in a place with decent, clean power. I live and work in the northeast and our power is terrible. Today, I am getting 114 volts to my conditioners because it is warm out.
That being said, I have on multiple occasions plugged a TT2 Or a Dave directly into the wall to test equipment away from my core system and it sounded great. Because of the way the power supplies are designed and the RF Filtering that Chord applies, you likely will experience no benefit from power conditioning.
Everything I have read and practically experienced tells me there is no benefit from line conditioning with Chord gear though some folks claim they have heard some benefit with uber high end ($20K+) conditioners. That is above my spend level so I will just have to trust them. I used a conditioner more for my TV and to protect against surges.
In the end, external PSUs and line conditioners will always do more to improve sound the worse your power is. If you have good power, I am sure it will be fine.
I am a national dealer so let me know if I can help you out if you do opt to move forward.