We should really have a single, standard AppGameKit benchmark app - so we can run it on tablets and devices, and make our own list of devices and how they work with AppGameKit, would be very handy. I mean, I look at these controller tablet devices quite a lot, and for my needs they're too expensive, but probably not when a new generation is released, and the old kit is put on Ebay. Would be great to have a list of cheap devices that still cope with AGK.
I've only had to connect a tablet to a TV once, using mini-HDMI, but I had to hack it so it would let me specify the resolution to use - it would just revert to some horrible minimum resolution otherwise. It may have been the cheap tablet or cheap TV - All I'll say is get a mini HDMI cable and get it all tested, don't dilly-dally... the last thing you want is to not be able to show it on a TV, and the very last thing you want is for it to look bad on the TV.