Hi, following advice from the forum (thanks to all who contributed) and a lot of research I went for an INTEL NUC PC and a touch monitor.
Why do that and not get a Tablet PC?. A decent spec tablet PC would have cost more than what.I purchased and still be less powerful (unless I missed a good tablet model!), and with very limited IO (typically most tablets I looked at only had one micro USB port.
I like having the touch screen on stage with the main PC tucked away inside the rack. I have the Touch screen mounted on my X stand so I can keep an eye on things, make changes on the fly if needed, and it can give me stage cues if needed. So it is a plus for me.
You can check out my rig (and many others) on the “show me” page.
Like others above, I would not use the Touch Screen for manipulation of parameters, i have my FC300 foot controller for that.