Hi, My mouse is beginning to bug out on me. The best feature on it (the track ball) doesn't work when scrolling up and down. So now I'm in the market for a better mouse. Features I'd like to have in order 1. Track ball. Being able to scroll in 360degree is NICE for editing 2. Ergonomic. I'd like to get something that is better on the wrist. I really like the Zero Tension Mouse idea. 3. Wireless (if possible, but not that important) So for all the people who spend hours and hours editing or working with there Mac what do you use. For my Keyboard I use the Bella Pro keyboard with Shuttle Jog which I recommend. I've only found the Mighty Mouse to fit what I'm looking for but I really could use a mouse that is less stress on my 30 year old wrist! Thanks.