Hi Charlos,
I would also go for an iPad or iPad mini (you need the version with a sim-card - the others don´t support GPS)
Then you are free to choose the aviation apps you wan´t - i.e. the Jeppesen ones or Air Navigation Standard/Pro or or or.
There are several aviation apps available - adding weather information, weight and balance and so on.
You can also run a loogbook - and
have a copy of your flight manual just to your hand (I added jumpmarks to all emergencypages (pdf), so with a click I´m on the right side - and pdf supports searching, so if you´re not quite sure, just type the word and find all the pages, where the word is used.....