Looking for a really good device to scan my negatives, I found that Plustek offers good products such as the Plustek OpticFilm 7400.
However, for a quite similar price, the Reflecta CrystalScan 7200 seems to be an even better option as it comes with hardware based dust- and scratch correction.
To be investigated further...
EDIT 18/07/2014 Et voilà: Finally, I ordered an Epson Perfection V550 Photo. The best compromise between price (189€ on CameraNu.nl) and quality of output (Amazing ICE Technology that really removes dust marks). Excellent Review here. My own experience is available here.