I just got to use a friend's Toshiba 17" and it was great. I loved the 17" display. Keyboard was fine.
They don't use the touchpad either and had a wireless mouse. It was really nice. The 17" is not that much bigger to use but the benefits of the larger screen was amazing. It made the 15" look small.

The 15" is very short from top to bottom and very wide. The Toshiba 17" just looked like a better aspect ratio. I don't know if it is different but I liked it a lot.

So I'm not going to rule out the 17" Laptops. Lots of deals on them. Maybe people don't want big laptops?

Wayne, Thanks all for your advice and experience.