Your welcome Jim.
Take your time this will be an important decision. We'll be here.
You may even want to look for an ergonomic mouse this is what newegg had to offer: Newegg.com - Ergonomic Mouse
Just use the show all selection at the top of the list, and you won't have to go through 6pages, just the one.
It is your prerogative, but you can use newegg as a catalog and maybe find one you like at the place where you bought your machine, some of the local computer shops or electronic Department stores. Heck even Wally's World (Wal-Mart) might carry them.
Sometimes Shipping and handling balance or outweigh the cost of buying locally, FEDX Overnight $45.64; UPS 3day $10.02
Example: Newegg.com Shopping Cart
Personally I like a large mouse, but the DW needs a smaller one. I know, I could hook up two to satisfy the both of us, but I just get used to the one's that are comfortable for her.