I have had this set since tuesday and for the most part I have been running burn-in images until the evening when we watch a couple hours of Comcast HD. I can only compare this to my Sony GWIII and a Hitachi P42H401. It runs warmer than my GWIII but not excessively, my Hitachi plasma runs hotter. As for humming I have none I can only notice it when the room is silent. The image quality is much better than either the Hitachi or Sony, blacks look black to me but, I think I may not be the best judge for black levels since I have never described blacks on my sony as grey. I could take pictures but, I think that it isn't a very good way to determine image quality. So far every thing is sharp and crisp and the colors look really good especially, since I changed the picture settings to similar levels numbers as seowfn.
I now know what people mean when they talk about torch mode, I watched one movie that way and had to change the settings from the defaults because I found it to be way to bright. I also noticed that right out of the box in the defalt mode IR was horrible. I had my PS3 menus stay on the screen at least 5 minutes. The IR seems better since I have been running the burn-in. I also Noticed that with the cinema smooth my audio was out of sync on the first movie I watched. I watched a little of "I Am Legend" last night and did not notice any issues but, I was working out and wasn't looking to closely. I also don't know if I had the PS3 setup right on the first night. I have made changes since then so, maybe it is fine now.