IMHO ATC. Harbeth and Spendor sound colored by comparison.
For the OP, ATC probably won't work if a syrupy coloration is what one is looking for.
Listening to a pair of Harbeth 30.2xd’s with my INT 25 right now. SVS Micro 3000 sub. I upgraded from 30.1’s earlier this year. SL1200GR table, EAR 834p Phono pre. Dynavector 20x2L cartridge.
The Harbeth’s drop off pretty quickly below 54 hz, which is where the sub kicks in.
it’s a really nice “apartment “ system, and I mean that in a most positive way. I wouldn’t know where to go from here, in my listening area, with the music that I like. My room is approximately 13.5 x 18 feet, speakers 24” from the wall on the long side. Jazz, acoustic music, guitar, piano, VOCALS, etc.