I'm currently deciding whether I should go for a bluetooth or a wireless mouse for my MBP. I've narrowed it down to: Logitech V470 Logitech VX Nano Logitech MX Revolution Now, what I would like to know first and foremost is, does any one know their dimensions? I currently own a very basic white Logitech USB optical mouse of standard size. From the looks of things, V470 & VX Nano seem to be a bit smaller than my current mouse, and MX Revolution seems big - normal size just like my mouse (if not slightly bigger, but surely broader). Are my assessments true? Secondly, I love the idea of a bluetooth mouse. No wire, no plug. Great. But as far as bluetooth (V470) is concerned, I've read people say that it lags, which was sort of a turnoff for me. My question is, does it lag more than, say, the wireless VX or MX mice do?