Cheu got me into purchasing a pair of ATC 20s, a few years ago. I didn't have the budget for buying it new, but luckily I found an MK1 from the early 00's in good condition in a British studio that was kept as a spare set, so pulled the trigger and happy that I did. So, yes, let Cheu guide you into the high-end monitoring world, he won't dissappoint you.

Yes, with ATC you are well set for 20+ years, you can concentrate on your skills with a tool like this at hand. Your room can also accomodate the larger 50 model, the 20's are fairly forgiving with smaller rooms, so if your studio is decently treated, you'll have no problem, even with the low ceiling.

,Andrei