I researched a bit about the i/o of the different controllers and expansion boards. Also about the price.
I came up with the following hardware setup. Of course not final.
Does anyone want to comment this?
The EZ-Lite is ~400 Euro (at farnell.de)
and the ic's cheaper than 5 Euro per piece.
I will think about it a bit more and maybe ultimately buy it.
Oh, does anyone have an idea about tft? It should be touchscreen and water proof... I mean the front cover. I would then think about a water proof frame so it can be installed in a tiled wall in a bathroom.