I use the Magic Mouse and love the included case... I have a Microsoft Presentation Mouse 3000 (as I remember the model name) and it was expensive and had a built-in laser pointer but it has been discontinued...
I wasn't a fan of the Magic Mouse either, at first. It's grown on me and I now have three of them. One for portable use and one for each of my two bluetooth capable macs. Squeeze from the sides, under the top surface. It seems to take a light touch.
I did try a newer Microsoft Bluetooth mouse at the local Worst Try and liked it but then saw the Magic Mouse...