I have an Electric - Ice Trackball from GGG (and yes, it's a Betson Imperial Trackball brand). I absolutely LOVE it. The new version 2.0 has a heavier trackball and feels just like the Happ brand. It's great. It's super easy to hook up, since the interface board is already attached to it. It comes with the USB cable too. Simply plug it in and Windows picks it up as a mouse. It also has 3 mouse button connectors on it that you can connect pushbuttons to. You can make your own wire for the mouse buttons or you can have Randy T from GGG make one for you.
Please note, that although it has an RGB LED on it (4 LEDs to be exact so it's nice and bright) an LED Wiz is not necessary for it to work. You can do like I did... I bought it by itself, and connected it to a 5v power source for a solid color. Then I eventually upgraded later to an LED Wiz where I can control colors on the fly via software, etc.
Here's an excerpt from GGG's website with instructions: "There are 4 wires connected to the lighting module. The one marked with red is to be connected to a 5v DC power source. The other wires, in order following the 5v wire are Blue, Green and Red control lines. If you own an LED-Wiz™, these would be connected to 3 outputs of your choosing. Otherwise, to hard wire a specific color, just attach the desired colors control line to ground. This can be done in any combination you desire to achieve one of 7 colors, or small resistors can be added in series to create any color desired."
Hope this helped!
~ DeLuSioNaL