I hope I'm not disturbing the dead, but I thought I'd try and simplify things.
This is what I remember form back in the day, and I googled to confirm, so here goes:
1. For general non-melodic samples (vocal, perc, etc), it's common to use F-3 because it's half the 44.1khz CD frequency, so 22.372 Hz.
Don't remember why exactly, maybe it assumes sampling from a CD-quality source, and then it makes sense like scaling an image to 50% giving better results than scaling 43.7%.
2. For melodic stuff you want it tuned to C, so 16.726Hz. Halve that for an octave lower, etc.
3. If you want to get the highest possible frequency, go for A-3 = 28.185 Hz
4. DSS was by far the best Amiga sampler I ever saw. I had amazing results with it even sampling from tape, esp if using it's own software.
It is however hard to believe that there are no proper software resamplers with antialias or dithering or whatever is needed to make it not sound like shit. Will definitely investigate more as I finally got my "channel z" fitted with a CF card.