There's little point (but still is) of scanning higher than 4000dpi, however, going below that, to me is a no-no. At any rate, scanning a 35mm film frame at 4000 dpi will give you an image of only about 21MP. Plus, I haven't heard of any digital ICE-compatible flatbeds but then, I didn't really do any research on this. Not sure what's the deal with flatbeds these days but I doubt that any affordable models can scan at true, optical 4000 dpi. With optical resolutions below 4000dpi, you could run into serious film grain aliasing problems with certain emulsions, chiefly color negatives but other types too.
