Neither, I am too cheap to buy a $200 topper or a $250 sheet of glass. $400 Color DMD-are you crazy? I personally would rather have more machines instead of a bunch of mods. I would rather save up for another machine, and the funny thing is as time goes on I actually am starting to prefer my games to be completely stock and all original. I now look for non-modded games that are pristine when buying games. Complete turn around from when I first started collecting and all I could think about was how to mod my machine instead of just playing it and enjoying it.
Only mods that get my money are Cliffy's, shaker, Polk Sub, or LED's