Yeah I like the board you've created and it seems easy enough for me to tap the expansion port (I'd put this in my CD Dock). I'm just wondering if RGB is significantly better picture wise than component. Like if composite is worst, then Svideo, then Component and then RGB. Unfortunately pictures on the internet usually don't do what everyone is seeing on screen in person justice.
I know that you can't answer the question personally not having done an RGB mod, but would be interesting to get someone's take that have seen both.
As far as I can tell, this (like many questions) is a very subjective answer. However, the most common answer I've seen is "YPbPr and RGB are basically interchangeable for most people's perceptions", meaning that while RGB may in theory be a touch better, the average human eye won't be able to tell the difference. I know I can't tell a difference with any pictures I've seen (which you seem to intimate is the same with you -- I also don't have any RGB or scart connections to test), and I know I CAN tell a difference going from S-Video to Component on my various systems (some more so than others depending on how good the S-Video was).
Take that for what you will, but I for one am happy getting things into YPbPr rather than monkeying with converters that are bound to add lag in an effort to turn RGB into HDMI (since there's no real other way to use pure RGB without finding a PVM or something).
That reminds me, I really need to send turbokon my Jaguar so he can test that one out