Integrated amp for Wilson Audio Cub 2's

I heard the Wilson Cub 2's probably about 10 years ago. They were being driven by Ayre electronics and the source was a flagship Sony cdp. To this day the Cub 2 remains one of the fastest box speaker i've heard. It does have a "pro monitor" sound that I would try to tame. I would look for an amp with some warmth/texture and capable of creating a big 3D soundstage. Of the amps you mentioned the Pathos would be my first choice.

I have a pair myself. They aren't my main speakers but I do like them because they are a bit more forgiving than the speakers in my main system. A couple of things you have to be careful of with the Cub's is gain and how clean the components upstream are. You can get a lot of hissing/noise if you don't match your components right due to the fact that they are so sensitive. The Ayre is the best choice of the 3 you list. Its as clean and quiet as they come. The fact that it doesn't use an active line stage is a big plus. The ARC probably won't work very well for you. I would only consider it if you are able to try it in your system first. I have heard the Pathos, but I'm not sure. I don't know it as well as the other 2.

In case you are wondering, I use a VAC 30/30 on mine and I also took one of the Ayre V-5's out of my main system and tried it as well. They are both a great match. I do prefer the VAC, but its pretty close.

Take a look at Coda Technologies...There are threads and other history of their gear...I own the CSI integrated..LOVE IT and drives my 4ohm Tyler Acoustic Woodmere II's

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