this mouse does the job:
http://www.logitech.com/index.cfm/mice_pointers/mice/devices/149&cl=gb,en
[rant]
If you do go for an ergonomic keyboard, avoid the Microsoft Natural Ergonomic 4000 (I have one at work) it has an annoying 'feature' called the F Lock key, which I seem to be able to press on regular occasion. They've added shortcut keys to the function keys that perform common tasks, like undo and redo which are on F2 and F3, which also happen to be the shortcut keys for rename file in explorer and is used in most apps quite a bit. So, in explorer, you copy some files to back them up, go back to the original and press F2 to rename the file, it doesn't work, you get frustrated and just right click and choose rename instead, not realising that it's undone the copy operation and the backups you made have been deleted.
One of the many possibilities for F-Lock fun.
Also the back and forward buttons on the front of the keyboard are easy to knock, so I've disabled them.
Typing on it is just find however and apart from the above, it's a reasonable keyboard.
[/rant]
http://www.logitech.com/index.cfm/mice_pointers/mice/devices/149&cl=gb,en
[rant]
If you do go for an ergonomic keyboard, avoid the Microsoft Natural Ergonomic 4000 (I have one at work) it has an annoying 'feature' called the F Lock key, which I seem to be able to press on regular occasion. They've added shortcut keys to the function keys that perform common tasks, like undo and redo which are on F2 and F3, which also happen to be the shortcut keys for rename file in explorer and is used in most apps quite a bit. So, in explorer, you copy some files to back them up, go back to the original and press F2 to rename the file, it doesn't work, you get frustrated and just right click and choose rename instead, not realising that it's undone the copy operation and the backups you made have been deleted.
One of the many possibilities for F-Lock fun.
Also the back and forward buttons on the front of the keyboard are easy to knock, so I've disabled them.
Typing on it is just find however and apart from the above, it's a reasonable keyboard.
[/rant]