Well the Kensington Turbo Pro is a trackball available in bluetooth usb and the one I have an ADB version which is absolutely cloud nine because it also has 4 fully programable buttons surrounding the trackball which is slightly bigger than a cue ball.
Don't understand why you would need a scrollwheel as well, I have programmed via the Preferences Pane the top left button to do automatic scrolling. You can also program combinations of buttons like my lower left and right buttons are programmed so when held down together do a 'find' depending in which app or window I have open.
Believe me its a dream the dream can only get better if I can one day get the bluetooth version.