The HX909, LX900, and NX810 (in 60") all have fantastic black levels. I've owned the NX810 for about 2 weeks now and with normal content I've never noticed ghosting or other black level issues. Now I'm sure if I put some "special" content on the screen I'd be able to scream that I have issues but with the movies and TV viewing so far, it's fantastic. I've even turned the dynamic edge lighting control on and off and view content and I'm unable to tell the difference. That said, if I could have bought a 60" HX909 that's what I would have bought.
Also, the black levels dimish very quickly as you move off axis. On axis the blacks are stunning. just 5 degrees off axis and they start to drop, and at 30 degrees off, they are bad. Viewed on axis the black bars on the screen disappear. Viewed 30 degrees off axis and they are dark grey.