I have always worked on an A4 tablet since 1999. I chose the big size because I’m working with two displays and want to access both with the tablet. The screenspace is projected proportionally to the tablet, meaning that the both 4:3 screen spaces add up to one 8:3 strip on the upper half of the tablet. That means that I’m effectively using only one forth of the A4 tablet (which equals A6) for every screen and the lower half is completely unused. Considering that, I would say that even A6 is big enough if you work on one single screen.
When the widescreen formats of Intuos 3 were introduced I encountered, that an A5 Wide tablet would be the ideal solution to my dual monitor setup. I wasn’t using the lower half of the A4 anyway and the widescreen format worked towards my 8:4 screen space.
That’s one of the reasons why I now chose an Intuos 4 Medium. It features enough space even for dual monitors and would work perfectly with a single widescreen monitor (which would be a good alternative for me instead of using two 4:3s). Additionally, it’s just small enough to pack it together with a notebook computer, which becomes more and more an option as performance even on the cheaper machines becomes better.
So, to put it in a nutshell, I would recommend the Intuos 4 Medium to most users.
i guess 70 for a new generation and 2 years warranty wouldve been a