I went to Media-Markt this afternoon, and saw this nice optical mouse, dressed with a Mac-like designed dual shell and lighted by a blue LED. It has only 2 buttons and a 3rd button-scroll, but it’s just enough for what I want to do. It looks a bit lik this (didn’t find an exact picture of my mouse):

Ergonomy is good, and it only costs 12€…so I didn’t hesitate a second, as I was still using this damn small optical mouse I bought with my laptop (which doesn’t need a mouse anymore, but a new video card!!!).