A few opinions
I have an lx55 the one down from this and they are very similar albeit 7.2 vs 9.2 and a slightly cheaper audio processor and a few other bits, there are a couple of niggling issues.
1. HDMI pass through works with bugger all. In order to work a device must be hdmi-Cecil compatible.
My Xbox isn't
My ps3 isn't (although I hear the new ps3 slim is)
My apple tv isn't.
2. Annoyingly for such a connected device, the wireless transmitter is external which means another box. But it was pretty naff anyway since it is only g rated rather than n so after about 1.5 songs through AirPlay (iPhone-router-receiver all wireless) it would lag and cut out. Installed a LAN cable from router to receiver - problem solved
3. The Internet radio is Terrible. It's virtually impossible to find what your looking for. Perhaps they should integrate the radio channel selection with the iControl AV app as that would make it much better! If I listen to the radio I usually resort to tuning in on my tv and playing the sound through the amp via the ARC
Apart from these three relatively minor things, the amp is superb. Can't think of a better amp. It provides killer sound to my kef3005s and not only is It amazing with movies but it is also a fantastic musical performer. I thought I'd miss my old CA/Kef iQ 5 set up but I really don't. Even on AirPlay.
And also brilliant is the mentioned iControl AV app. Superb control from both iPhone and iPad of the receiver. Now if only samsungs iPhone app wasn't terrible I could chuck out another remote:D