This is now my second ColorDMD, both LED. The first in a TFTC and another in a BSD.
I first opted for LED in the TFTC because I didn't want to dremel the interior of my speaker panel for the LCD to fit, and didn't like how the top of the LCD screen could be seen as a black form in a bottom part of the translite. I'm so happy the way the LED looked and never considered changing.
Then had an opportunity to grab color for BSD, and once again I couldn't be happier with LED. Looks great and I don't have to lower my speaker panel every time I want to swing open my light panel to see the boards.
It's really personal preference, both are a luxury, both are awesome, and may always be a game to game decision. I seem to like MET in LCD, but sticking to the original technology of an LED screen just with a splash of color feels right. With all the odd fittings it seems weird to mount a laptop screen in a game. I'll probably feel different when I try LCD one day.