Simaudio I-7 or Pass INT-150

With anything it has to do with how it works with the rest of your system. They are closer to each other than different.

They both have good soundstages with the Pass being better in this area.

They both have a slight metalic shimmer in the highs that can be bad with dry or bright speakers. The Pass is warmer in the upper midrange which helps mask this.

Both have fast bass with the Simaudio having an edge in this area.

The rest of my system is a Simaudio Supernova cd player and Dynaudio Contour 1.4 speakers.

i think the BAT really works well with my C1s...and its cheaper than either option

I demoed both and found the Pass to have better resolution and transparency while being more musical. The Plinius was good, but the sound seemed closed-in compared to the Pass.

Oops, I meant to say Simaudio, not Plinius. But it holds true for the Plinius as well.