Welcome to the forum!
I use Epson Scan more or over SilverFast and i like it more, i have VueScan and i use it as well sometimes.
1. I scanned my friend B&W rolls [i think mostly 35mm format] and got nice results, maybe some are not so contrasty but i fixed this with some adjusting, i will try with my B&W later when i will develop some.
2. I scanned with 1600dpi up to 6400dpi, didn't see much difference except that 6400 is larger file, no more details i saw anyway, so if i will print some large up to 16x24 i will scan either at 2400dpi or 3200dpi.
3. As i said above, I prefer Epson Scan over SilverFast because the interface of Epson Scan on "Professional" mode is way better than SilverFast or even Vuescan, but as it was said, all software should give equivalent results with certain adjustments or tweaking, and i posted a thread here asking about that and got answers and i am still learning to do that and see.
4. I love digital ICE option, but i found that it will soften the scan, but it is up to you, do you want a soft scan but clean from dust or scratch maybe or a scan full of dust/hair, scratch.... but sharper?
I asked about scanning on APUG before as well, and they transfered me to here
They don't want to go digital path, all pure analog and film even in printing.
Welcome again!