I have been using a NEC Multisync SuperBrite (21" CRT)  for quite a while, and it does a great job with Mame, especially vector games.  I am borrowing a 25" Samsung LED, while it **IS** brite as hell, the blacks are just not black like on a CRT.  I had read that a LED looks better than LCD because the brights are brighter and the blacks are supposedly pretty black.  I beg to differ.  I have a 20" Samsung on another machine in the same room, and do not notice much of a difference between the blacks on both of them.  If I open a white web page, with a lot of text on it, the LED is **WAY** brighter than the LCD.  But the blacks are still back lit and it shows.
My question is....  Has anyone here ever used a tinted/smoked piece of glass or plexi??  As bright as this thing is, I know the colors would shine right through, and I see know reason why darker glass would not mask out the grayish background that should be black.  Anyone tried this?  Thoughts??