At this moment in time, I wouldn't have either! ATC's are silly inefficient, sound bland all too often if underpowered and seem to suffer an over projected upper mid these days. The 3/5A is an outdated squeak-box and vintage ones will ALL be out of spec now. Harbeth P3ESR's eat them alive!
Loads of small alternatives, but I was quite impressed with the Sonus faber Venere babies. Not perfect but good looking and fun to listen through to the music and musicians making it - far more 'transparent' in a musical-emotional sense to me. The Rega RX3 is another at similar price that gets the emotions going and the new more solid cabs inspire confidence.
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me