I have M2s and love them, they are a ridiculously good speaker for the money. I'm using a McCormack DNA 125 which is 125w/8 Ohms and 200w/ 4 Ohms and it drives them cleanly at higher volumes than you are likely to play at with normal listening. Most speakers are damaged by low powered amps that are driven into clipping, not a higher powered amp.
They should work well with the 252 it's an excellent amp.
They should work well with the 252 it's an excellent amp.