A touch sensitive mouse makes more sense that a TS monitor.
Having tried the newest touch screens on the HP desktops, I found the reach and unusual back positions to be very disturbing. In limited applications, like point of sale (restaurants, etc), touch screens are fine, but for hours of desktop program use it just doesn't work. A touch sensitive mouse might just be the more sensible approach since you can keep you arm and hand in a more comfortable position with less stretching (and straining). All that being said, however, the design and sensitivity of such a mouse is something I guess you'll have to just experience for yourself in making the decision. Having worked with the Adesso TouchPad in concert with a standard mouse, I found that they both offered specific benefits. Maybe a touch sensitive mouse will combine the best of both units. Hard to say for sure until I actually try one.