My tip as a long time M2M coach, M2M is the best defense for guarding against the 3. Except for maybe the 3-2 zone, but even then, I think its close.
Man defenses really really benefit from good speed. I think speed and def rating are the two most important for holding teams to a low FG%. Ath & Blk help for bigs, but really speed and def will generate a ton of steals and not too many fouls like a press.