Green, blue, even yellow LEDs are the way to go, orange is like in between red and yellow.
The black PCB in a small board doesn't say much, but black looks better than green, and we can't have all PCBs red, right? ( ... blue?).
The metal casing of receiver plus black PCB is kind of retro, but maybe it is of better quality, is like the Honda Element, you get to like it in time. I need to make a case for this, hopefully my rotary tool will ship soon.
Someone posted that the IR Toy will fit in a tic-tacs case, I thought that was a neat idea.