Have you been into the Forum along the left column here called "HDTV Settings"? You may find ideal settings there for your Sony.
For those in a dilemna between choosing a Samsung or a Sony this review may help because I have purchased both within the last several days. I've noticed definite differences.
I initially purchased the 46 in Samsung Series 7 750 because of the great reviews. A few days later I took it back because its remote does not control the audio out volume . Since I run my sound through my stereo this was a major annoyance. I exchanged it for the Sony XBR9.
I personally like the feature set on the Sony better than the Samsung. It allows more flexibility such as labeling source inputs and the aforementioned contolled variable audio out. However the picture on the Samsung is in most cases better. Surprisingly Samsung seems to have a much better video processor than Sony. The Sony to exagerate noise and pixelation and has more artifacts. On pure 720p HD and 1080p there isn't much difference between the two, but on lower quality and standard signals the Samsung makes them definetly look better.
Even when in HD such as on a 1080i broadcast the fine patterns in say a herringbone suit will sometimes strobe on the Sony which is very annoying. Perhaps I haven't yet learned the correct settings on the Sony, but all I know is it didn't do it on the Samsung right out of the box.
There is much talk about the glare on the Samsung, but I did not find this to be a problem or at least not worse than the Sony. The Sony's matte screen produces a more diffuse glare, but because its covers a larger area I am not sure that is really an advantage. In both sets once the screen is on the glare in usually unoticeable. I probably even prefer the Samsung on glare.
Bottom line: If picture is your number one priority go with the Samsung. Everything looks good on it and has more picture adjustment than the Sony too. If features like controlling audio out and other such things are your priority go with Sony. All the features I think it should have it does. Its remote can even control my Series 2 Tivo.
Perhaps had I not viewed the Samsung first I probably would have thought the Sony picture was fine not realizing it could be better.
Finally Kudos to Best Buy for making the exchange so easy. Both sets were offering free Blu Ray players and Best Buy allowed me to exchange my Samsung player for the Sony and gave me $151 back to boot.