Hi Marc,
I've been using an iPad at work as an electronic flight bag and, as much as I hate to admit it, it's been great and it's easy to read. It attaches to a mount that is suction mounted to the window and mine has never turned off even though it's right there in the sun most of the flight.
The cutout for the iPad mini mount is already done, the radio cutout was made and bent today, and I'm working on the opening for the engine monitor. So we'll see how it works sometime next year when it's flying again.
The GI-275's are nice, good screen, flexible features, glad to hear you like them.