I was an audiophile for 10 years before I got into recording and mixing music. At first, I used what I had.... audiophile speakers, for my mixing. As my skills grew, I started having the common problem of "translation". Why did my mixes sound great on some systems, and terrible on others??
I'm 56 now, and I've been through many audiophile speakers in my living room, and many "studio monitors" in my studio. I've shopped extensively for monitors and I'll be darned if ALL these monitors that are supposed to be ruler-flat all sound very different from each other. Ha! Anyway, I've finally found a pair of speakers that are fun & pleasurable to listen to, AND my mixes sound good and translate well to other systems. Studio Monitors are a TOOL designed to get a job done, but that job is a creative endeavor, and thus they are still a very subjective thing.
As for ATC's..... I home-demoed a pair of the $13k SCM50's for a week. I did not like them. I loved the low end, but not the mids or highs. But that's just me in my studio. Other engineers swear by them, and good for them. I listened to many monitors in the 5-10k range, and purchased ADAM S3H's. They tickled all my boxes just right, and 4 yeas later, I still enjoy them tremendously.
Just 2 weeks ago I got a new Cadenza Blue cart for my Sota turntable, and my vinyl has never sounded so amazing. My ADAMS sit atop stereo 15" subs, so it's a true full range system. This, "to me" sounds better than most systems I hear at audio shows. These studio monitors bring me great pleasure, and sound more like live music than many sub-$20k audiophile systems.