Voigtlander 65mm f/2 APO and coming soon, the Voigtlander 110 f/2.5 APO, which is actually a 1:1, while the 65mm is a 1:2. I think it's worth having a Sony system just because of these lenses.
I have the 65mm. Excellent color correction, and probably the sharpest FE mount lens you can buy, however, I was wowed by some samples of the new Sony 24mm 1.4 GM @ 1.4. That lens is insane, but not APO by any means (and also not a macro lens).