Yeah I think I'm just going to accept running in HDMI mode. I took some photos close up and realised what I'm seeing is an orange glow on some letters, particularly prominent on straight lines e.g. L and larger font sizes. It's news headlines that look particularly bad. Up close it doesn't look so bad, or further back for that matter, but at my current range (approx 26") it just looks like there are extra lines next to the letters.
I've been using TN for the last few years, so I'm not really in any position to start complaining about colour quality anyhow.