Razer Orochi is the best bluetooth mouse out there. Especially in term of sensitivity, customability, and precision.
It has 7 programmable button and dual mode .. wired to get maximum potential and grade of gaming mouse and bluetooth mode to get less-sensitive but more comfortability of wireless, and dongle free!! Yet in bluetooth mouse world, it´s still the best
Some drawbacks ... in wired mode you can´t recharge the battery, even if you use something like Sanyo Enerloop inside, it still won´t charge. But wired mode need no battery, you can empty the shell and still glide the mouse in wired mode
But the form factor could be better though .. many people complain it was a bit too small, and aggresive power saving mode could make a bit frustation, but other than that .. Orochi is zillion times better than Magic Mouse !!Just google it and read some review 🙂