Tablets - What's the best choice?

The network has recently been looking at the potential use of tablets within schools.
At BETT there where loads shown off and they have been slowly being released.
I have been looking at a number of the main offerings. I have looked at the iPad of course and the windows based RM Slate.

Recently I have had the chance to look at a Acer Iconia, which runs Android Honeycomb. Below is a video of my impressions, anyone else have any thoughts?