the FA can be found for under $300 and it's just a beautiful lens. It's really sharp wide open, very fast focus (cuz it's so light) and as such i actually think it's a 'better' lens than my workhorse FA50f1.4.
the DA is built like a jewel. so if you got money to spent and want to macro, go for it.
the FA version gives it just a little more light. I love using it wide open, great for chasing kids indoor
FA35f2.0 at f2.0 x1/45s... now she's 2 years old...good luck trying to hold her still for a shot
... in this situation, i think the FA 35 could do this better & faster than the DA could.