Installed a Raymaribe E120 2 years ago....love itsflexibility and that it interfaces with radar as well as weather. I prefer the inerface with my other instruments as my main source
I also would like a backup tablet, but am waiting till later this summer when two or three of the new android tablets come out ( LG Nexus is one). When comparing the apple i phones with the android ones I got a droid and feel the tablets will follow suit. ( i am waiting for the new HTC pyrimid) No sense in switching to apple propreitary products here. I am not putting them down as they are quite good just my personal preference. Having a a backup "pad" down below I think is a good idea plus I wont need my laptop anymore.
Always have paper charts though and use them first., but the plotter is more than a map, and the tablet is more than a plotter.