I would like to share my experience with logitech keyboard and optical mouse. I have taken a home computer, It is an assembled one, I brought the keyboard and mouse of logitech, even after using of these for 6 years still I feel the efficiency of it.
I have seen various keyboards and mouses like dell, amkette, lenovo etc. but I can say the best is Logitech only.
The smoothness will typing and freeness while moving the mouse is very impressive I brought 200 version of this.
Better go for logitech No confusion Its clear.