Grr. Your going to make me type out one of my Logitech rants...

So yes, I love their products. And I'm thinking about one of the newer Darkfield ones, probably the newer Performance MX. They have me hooked on the flywheel to the point I made sure to buy one for work as well.

The rant comes in because they continue to refuse to make their desktop mice in Bluetooth varieties, except when bundled with a keyboard. I don't really care about the dongle on my desktop, but I want to take a full sized mouse with me when I travel with the laptop. And with only one USB port on my current system, it gets frustrating to have to fill it with a mouse, when Bluetooth exists for this reason.

As for the flywheel toggle, it's different on their different mice. My Revolution MX (pre Darkfield model) uses the click on the wheel to toggle. My friends Peformance MX (same thing with Darkfield) moved the toggle to that button below the scroll wheel.