You asked for illustrations, so I'm going to post some photos of the lenses you mentioned - all except for the FA 35/2. But I have the FA 31, the FA 43, and the DA 35 Macro, and I use them frequently.
Shot with the FA 31 and processed in Lightroom:
Show with the FA 43 and processed in Lightroom:
I find that both the FA 31 and the FA 43 provide that 3D "pop" you hear about, but only if you shoot wide-open or close to it and if you are really close to your subject - roughly the closest focusing distance possible. Of course, if the background is really far away, then you don't need to be quite so close.
The DA 35 Macro is quickly becoming one of my favorite lenses, and something of an all-around lens for me. It doesn't quite have the same kind of look as the 31 or the 43, but it's still a remarkably sharp lens, even at f/2.8. It's slower to lock focus than a non-macro lens but it is by no means slow (at least compared to lenses like the D-FA 100mm Macro).
This is always a tough decision, and like you I very nearly went with the FA 35/2 when I first bought a DSLR. I went with the FA 43 instead, though, and never regretted my decision. I picked up the other two lenses later.