Just a quick lighting and material pass on the microscope. The black plastic isn't black enough and I don't know if the reflections aren't glossy enough or if the surface itself is too reflective at the moment.
Clearly the metal looks wrong...very...very...wrong. Too glossy and too stock Architectural Chrome which I used as a base to work from.
Light is a Portal Light with a Mental Ray CIE plugged into the Color Multiplier Attribute. This is a trick I picked up from the Mental Ray course I took through CG Society and its a great one. Gives a really nice light and its a great way to control the colour and intensity of your light.