When purchasing my new laptop, I was also looking for an affordable wireless laser mouse. I just didn't want an optical mouse because I already work with laser mice on my desktop and at work (both also from Logitech) and these are really a lot nicer and more precise.
I chose the M705 because it has a more compact size and yet does not feel small to use. It fits comfortably in the hand. I also use the M705 daily at work, which is why this choice was made quickly when the price is right.
You can find the mouse cheaper on the internet separately, but in combination with the laptop, the complete deal at CoolBlue was the cheapest. And you also know that you are buying the items from a reliable party.
Overall very satisfied with this mouse.