I've had the 55" since 6/2 I put it in my office as a (work) pc and gaming display, that's where I spend most of my time. I believe that I had the new firmware right out of the box, But I'm not sure.
My PS3 and PC are hooked up to a sammy ht-e5500w thru hdmi, my tv is connected to the ht thru hdmi1 (arc). It all works great, I get 5.1 while watching air channels when 5.1 is present. great sound when watching movies and shows on netflix thru the PS3. 3D works well, Games and Movies look above average to me and my family. We have a sam 65f8000 in upstairs den and sharp 80 le857 in basement theater. So I have a couple displays to compare against, It's actually a great tv for it's picture quality.
Don't forget to set picture to game while gaming it helps out a lot with video lag issues. My vizio remote works the whole setup the HT and the PS3 have no issues working along with this tv. The PC acts weird with it I thought that it was my last displays problem but I think it's my video cards fault.
Anybody else have any picture settings that they would like to share with us.