Quandary

Unfortunately, he’s not going to leave the Rogue with me. Hopefully I can tell something about it’s character, including the impedance issue, before he brings it back.

The synergy between the Benchmark and the other components in my system is quite good.   
 Unless the Rogue exceeds  Benchmark’s quality, it will be a quick NO.

@mrdecibel 

Well, as I’m sure you predicted, the Benchmark blew away not only the Rogue but a CJ amp he brought over. It blossomed like a beautiful flower. The other two amps sounded dead in comparison. It wasn’t even close!
 As I’ve said, the synergy of my components is outstanding.

@rvpiano , at least you now know. Keep in mind, music and music listening should be an enjoyable and entertaining endeavor. What this means and what I have found by experience with myself as well as others, my mood matters when I listen, before I listen. This is another topic that can be and has been discussed on another thread, in fact. My best Always, MrD.

@rvpiano amplifier is one of the most impactful components in the system and introducing a different amp is a major change. Your system is tuned to the sound you like with the benchmark in your system. That includes all of your cabling. New amp is rarely a plug and play type of component.
You have to be able to hear the potential and commit to making additional changes if you change your amp, including cables and even a preamp. Ultimately it boils down to personal preference. If you don’t miss pass amp when it’s gone, then it’s not for you. 

Sounds like you got a lot of experience for your experiment. The conclusion that comes to my mind is that a major factor in your enjoyment is detail… that is what Benchmark is about… hence a really good choice for you. The Pass and especially  CJ are about carefully walking the line to balance detail, midrange bloom to capture the perspective of music in its venue . Anyway, hopefully you are happy with the experiment. It would have been worth it for me.