I spent a bit of time on the front panel and this is what i have come up with...

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The 3 rockers are mains (red), lights (grey) and spindle (green). To the left is the Estop switch with status LED underneath (bicolor). To the right of the rockers is the spindle speed control with yellow LED indicator. The top 3 LEDs are home switches (green), probe (blue) and limit switches (red). Underneath is the PC power button with green power LED and orange HD LED. (I may do away with the PC switch and just set it to auto power on in the BIOS)

The right hand side of the panel consists of the 2 joysticks, LCD display and 9 buttons which I will use to control some basic functions in Mach3.