The 7 Digit LED Bally style display that I installed into my dads goldball look good. I heard that style you can get in blue, green and orange!
Those ones are OK - it's the replacements for DMDs we are talking about here.
On that subject though - don't install more than 2 or 3 aftermarket 7 seg type units in the one machine or you risk frizzling the 5V power supply.
Refer here:
http://www.homepin.com/other.html
