I've been using a Tesco Hudl II (which was well ahead of its time in performance) and it's been brilliant at running SD. It's still available on ebay with new batteries for a price that you can try out the Android presentation without spending too much. It's GPS, compass and attitude sensors allow you to run some of the 'imitation instrument' apps that could at least get you through a cloud break in a full instrument failure. However I recently bought a Lenovo Tab4+ 8" tablet to replace the Hudl as the main SD presentation and that's been excellent but has not got the compass or attitude sensors built in. Total cost of the two would be around £200.