I have a choice of either YCC 4:4:4 or RGB on both the source and display. A wiki on the topic suggests it's preferable to have RGB, as YCC must always be converted to RGB with a few different algorithms.

However, I have also read that if a display can accept an RGB signal it converts back to YCC digitally first before the analog conversion to RGB, thus creating the need for 2 conversions as opposed to the need for only 1 with a YCC input.

What are the differences between the 2? To my eyes the gamma levels seem to be different as well as the overall brightness. I really have to turn down the brightness in RGB to comparable levels using YCC. After this correction, the picture seems a bit "darker" with RGB.

I would like to hear opinions on this as well. Try posting it in the BD player section. This thread is new and doesn't get much traffic.

What's the BD player section? Feel free to post as well and report back if you find anything!

There are no inherent shortcomings between the RGB and YCbCr 4:4:4 formats. One can convert from one to the other through a mathematical conversion with no losses. RGB is primary a color space used in PC displays (all the PC monitors speak in RGB), while YCrCb is used for CE displays (because these components better reflect colors in a way that we humans see them). In general, most CE components will transmit the video in the YCbCr format. Since most of the video processors are designed to assume that most of the video will be in YCbCr format, I suggest you default to that mode. In the end, it's worth trying both and seeing if you can tell a difference.