Long time back I used to use Kensington turbo mouse. I love that trackball, even use to play RTS games with it. Unfortunately, Kensington's trackballs have been lousy for several years. Made me go back to using a mice.
On my mac I use a Logitech MX1000, its very stylish and has lasted me a long time. It tracks really well. The only issue is that its a tad wide and weighs like a brick. In extended sessions it kills my hand. I'm not a big fan of logitech software on the pc or mac, but they are getting a bit better, if slowly. On my PC most MS mice bite, but the one that works for me comfort wise and with adequate sized buttons is the good old MS Intellimouse Explorer. The negative is that they tend to die fast. Next time I may consider a razer...
On my mac I use a Logitech MX1000, its very stylish and has lasted me a long time. It tracks really well. The only issue is that its a tad wide and weighs like a brick. In extended sessions it kills my hand. I'm not a big fan of logitech software on the pc or mac, but they are getting a bit better, if slowly. On my PC most MS mice bite, but the one that works for me comfort wise and with adequate sized buttons is the good old MS Intellimouse Explorer. The negative is that they tend to die fast. Next time I may consider a razer...