RF3Flyer,
I fly a flexwing and due to the proximity of the 'Base Bar' to the tablet when parking the plane 'wing-down', I have to mount my tablet in landscape mode. Having previously used an Android Nexus 7 tablet (wide screen display so very 'slim fit'), I changed to a 'WiFi only' iPad mini because it gives a better format (4 x 3 display) in landscape mode, so I can now see more of my route ahead than with the wide screen format tablet. At the time I changed over, the iPad Mini was one of only a few small tablets available in this format, though others are now available. In particular I have seen a 4 x 3 format Samsung I really like, which is almost the exact same size, for those with an aversion to Apple.
During PAW development testing, we used a variety of tablets, phones and navigation systems and, having just booted up PAW and tested it just to make sure, can confirm that the radar display also works on my iPod touch, so lots of display options are available, whether or not you want to subscribe to a proprietary Nav System. FWIW I heartily recommend, however, that you do consider doing so at some point as it co-ordinates the whole experience and makes it all so much more worth while.
Best Regards
Peter