Recommendation for a highly resolving amp

I have an all Benchmark stack in my living room (with KEF LS50) and that is my favorite gear, DAC3B | LA4 | AHB2 x 2. I even owned the HPA4 before I sold it for a profit. So some poplar gear. However, I do not think the AHB2 would work as well with the OP's speakers. 

I have Thiel CS3,7s and while the Benchmark stack sounded very impressive with them there was some missing low end. The AHB2 stereo and mono do not play nice with 2 Ohm dips. It was easy to see this when I replaced the AHB2 with the KRELL K-300i, LSA Voyager 350 GAN, and the amp I settled on, the CODA #8. They all had better bass than the AHB2 on the Thiel CS3.7. On an easier to drive speaker the AHB2 would be what I would use in a heartbeat.

https://audiophilestyle.com/ca/reviews/power-amp-comparison-cambridge-edge-w-benchmark-ahb2-bryston-...

A detailed comparison with the 4B3 & AHB2.  The AHB2 is without a doubt a nice piece, and at it's price point, perhaps the best option.  

Definitely a good point about the OP's ESL speakers.  Specs for the Sound Lab M545 ESL speakers show 8 ohms (nominal) and 89dB, so *should* be okay???

I have found the Benchmark folks to be very responsive, so probably worth sending them a note to ask the question.

Full disclosure:  I do use an SVS SB-2000 powered sub alongside my JM Lab/Focal Mezzo Utopias.  Some of the music my wife likes benefits from the sub for ultrasonic playback ;)

The best recommendation I can think of is to stay the heck away from
your buddies home. Spectral gear with Quad 2912s? I can imagine nothing better. Sell your stuff and rent out a bedroom in his home. Maybe he needs a chauffeur?
What is his sub array?

Was it determined if the room and speakers are adjusted optimally
as suggested by Atma? Gotta start there. 

@chungjh, While not my cup of tea; I have to respect Spectral for being amongst the top of the heap for "resolution".