I bought the 23" Acer touch screen. I mounted it horizontally at a slight tilt below my non touch 23" Acer. If I get a chance tonight I'll post a pic.
It's not perfect,but it's pretty awesome. Especially the navigation and zoom in track view.
Console view requires a high degree of accuracy. A screen larger that 23" would be better. It's getting easier the more time a spend with it.
If you are a guitarist, it kind of like using a right hand tap technique.
I've been using a track ball vs. a conventional mouse for years. Only because you don't need to move it around the desk. I've nicknamed my Microsoft trackball "Satan's testicle" . I think it's giving me carpal tunnel.The less I need to use it the better.
The bottom line is that I'm very pleased with my purchase.