I might be late to the party here since you posted in August, but if you are looking for really good ergonomics, I feel there are aren't many great choices. The only one I am very familiar with is the one my work provided, the Evoluent Vertical Mouse. Definitely not a conventional mouse, but a...
I know i have low post count, but I've been a member since 2010 and have plenty of PM's and sales transactions with people over the years... why all of a sudden stop long a time member (not a spammer/scammer) from using the forum?
Could you please consider my long standing to allow me to PM...