It used to be the case that the transparency adaptors for the scanners were inferior , for average use though things have improved
Epson make 2 scanners with this adapto included
Epson Perfection 2580Photo and
Epson Perfection 4870 Photo ...this higher spec model offers digital ICE ( compensates for dust and scratches on the negative or tranparency ) this started off a high spec feature on NIKON fil scanner a few years back
Unless you are printing larger than A2 size or are doing a feature in National geographic it shouldl suffice