Cheap mouse and keyboard (kind of for gaming?)

Hey I'm looking for a wireless mouse and keyboard.
I currently have the microsoft wireless desktop 6000 and I find the mouse to be too small.

Whenever I'm gaming (not hardcore gamer) or even navigating my computer, I find it to be a chore and actually quite difficult to navigate to the right spot at once.

Does anyone know of a good mouse and keyboard where the mouse is bigger? My budget is around $40.