Try turning the sharpness down to 0 on your display. Sharpness adds artificial data to the image to make it appear sharper. This can, in fact, cover up real detail.
In the case of BDs, it can ruin fine detail and enhance grain. You want the amount of grain the director intended and not more. On upconverted material, it can not only enhance grain, it can enhance artifacts, dirt, and other little video gremlins you don't want to see.
Sharpness was important in the days of analog SD video. Given how many people end up with their picture degraded by that setting being over used, I often wonder why they still include it. I guess because some people would miss it or because some people still use their HDTVs for SD more than HD.
Also, use the calibration patterns included on Sony Blu-Rays to calibrate your set. Most people have their brightness and/or contrast pumped way too high. If there is a contrast boost setting, turn it off and turn off any DNR settings as well. All of these little handy image enhancers usually do more harm than good.
Consider buying the Digital Video Essentials Blu-Ray edition coming out in March. It is a good calibration tool.
Chris
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