Vitor do you use A6?And could you enter sizes of the working space in cm or mm ?

@Touch function: I have the impression that those who talk about it, don't have a tablet with that feature. Two facts which I know from e.g. the Bamboo Fun tablet by Wacom:
a) you can en-/disable the function with a press of one button at the tablet
b) the touch function disables itself automatically if your pen comes close
That eliminates the problems you talk about.
For me it's not about the touch itself, but about its additional actions that you cannot do with your pen, e.g. zooming in and out. Nevertheless, I do agree: It's not a necessity and if you don't have it, I believe you wouldn't miss it.

I fully agree with A5 being the absolute maximum of what you need. As a matter of fact, I have A5 and reduced the working space a bit by custom settings. Call it stupid, but I just feel more comfortable to use it like that.