FX8 blurb says it has a PDF reader. You could forgo renewing the Jepp. subscription that it comes with and download the chart PDFs you need from the various authorities. Viewing them on the FX8 or other PDF reader would take care of A4 page size issues too. It might be a bit of pain having to download the charts all the time, compared to updating a Jepp. electronic chart package.
I'm rather tempted by the FX8. I'd probably use it as my primary approach chart source & carry a limited number of downloaded & printed charts as a back up.
It doesn't have a backlight so cockpit lighting that can illuminate it is necessary. I'd like it to have a user controlled LED backlight. That way I could choose how I wanted to use it at night (or in aircraft with less-than-convenient cockpit lighting sources).