@williewonka I think within the powered speakers space ATC have a much higher pedigree than Focal but of course do audition anything before you buy. I just went with the Grimm SQM XLR cables, I spoke with ATC and asked them if they had any recommendations and they just said any 'decent' quality cables are good enough for the speakers.
One thing I can say about the ATC active 50ASL speakers is that they can play loud effortlessly and without typical distortion (?) you get with other speakers and I've found they can play any genre of music well. This was a key difference in the other speakers that I had zeroed in on (Devore O96 and Audio Note) which could not handle heavier music like hard rock, metal etc. anywhere near as well as the ATCs. With the ATCs I was amazed at how the music doesn't seem to change with higher volume, it gets louder but still sounds the same. It's hard to describe but if you do get a chance to audition do give them a go.

