microswitches are momentary - like a control panel button, they only stay on or off as long as something is pressing it. the only reason i can think of using one for monitor power is whenever the cab door is closed the screen powers up? anyway, the switch HAS to be rated above the voltage & current you intend on putting through it. (any 250v switch will do) as far as switches go, theres millions of styles to choose from. i have got a red square shapes, illuminated rocker switch on top of the cab. easy to find & looks good. you could go for a 'panic' button (toggle) , - punch it for on again for off, rocker style (like mine) or momentary. farnell components have a huge range of switches.. might be a good start.