I bit the bullet and pulled the trigémellaire on the AD4.320. It seemed to have the right mix of power and price.
My experience with Starke and the amp was a mixed bag. After getting a very good deal (a good discount slight below Black Friday special), I was surprised with higher than expected duites because of an error on the commercial invoice listing the regular price. After initially blaming UPS, they acknowledge their error and offered a reduction on a future purchasing.
In use, I found the amp generated a hum - a situation that I had never encountered with any other power or integrated used in the same set up. I solved the problem by adding a Hum X to the connections.
Soundwise I was not overly impressed. I found that the jump in quality was far from the reviewers alluded to. Overall, it lacked the humpf of XPA-2 DR and felt the sound to be under-whelming.
Months passed and I stumbled upon the ASR reviews. Wished I had before.