Don’t you find that most of the high end imagers are made of monochrome CCD? If you don’t believe, just take a look on Meade Deep Sky Imager II Pro (DSI II Pro) as well as its predecessor, the DSI Pro. Obviously, both of them are made of monochrome CCD sensor.
Isn’t the picture captured tasteless without any colour? What are the advantages of monochrome CCD over colour CCD?
If you find it bored, you can always get a set of colour filters which is always an optional item when you buy this range of imagers. 
A monochrome CCD has higher sensitivity which allows you to get the same exposure in lesser time. It’s also low in thermal when capturing images thus less thermal noise is found. Furthermore, it has greater dynamic range which is very important in photography as it’s the factor which decides the luminosity range a camera can photograph. At last, its biggest advantage is it can be equipped with several colour filters to enhance the contrast of the objects.
If you just like to take simple procedure at astrophotographing, a imager made of colour CCD will always please you. 
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