I'm going to cut down to the chase about the samsung UN55D7000
The TV has so many good features (especially design) that are too many to list, thus, I will focus on the two things I have encountered that I know someone else might have experienced or will experience and are rather disappointing...but don't lose your hopes just yet!
1) Backlight bleeding - My TV came set up for 'store' usage mode, instead for 'home', which increases the bleeding drastically.
Changing to 'home' is quite challenging so you have to read the manual. After I changed the usage mode to 'home', it decreased considerably but was still noticeable.
I visited some forums, websites, and some even advised to put pressure on the screen with my fingers (until I see the screen changing colors), etc, but nothing seemed to work.
I decided to contact Samsung support and they advised me to change PICTURE MODE to 'STANDARD' and adjust the 'BACKLIGHT' to the value of '7'. The support guy/girl mentioned to leave this setting on for 3 weeks. After the three weeks, I should be able to change to any picture mode and to any value for the backlight. Finally, it was mentioned that if I did not see any changes, that a service ticket needs to be placed at this link (you will need to register your TV with Samsung): [...]
I made the change today 4/15/2011 so I will wright another review within 3 weeks to let you know the end results.
2) Sound stops working - I only have a PS3 and a DirecTV satellite box connected to the TV via HDMI cables (hight speed and 3D capable). I have noticed the TV produces no sound for like 1 second and then gradually comes back at a lower volume until it reaches the original volume. I have also noticed it only happens when the picture is set to 'STANDARD' and have only noticed it when the source is the DirecTV box.
I do not run the PS3 on standard mode so I can't compare, but I will do so and pay attention to the results.
In summary, I have to wait for the 3 weeks picture test, and also test the sound using the PS3 source on standard mode.
I know it's a hassle but for a TV that costs over $2000, I'm willing to do whatever it takes to get a "perfect" picture and normal working sound (although you would not expect to do this since you are paying a lot of money)
...And if you got this TV from Paul'sTV (whether by Amazon's reseller program or directly from them) expect to pay 15% restocking fee and $100 shipping if you plan to return it.
Hope this helps and please post any questions/comments you may have, and I will try to answer them as soon as possible.