i agree but the nordost product makes the russ andrews prices almost seem sane !Perfect for those rich spods for whom hifi is for showing off their super expensive kit to their rich mates, rather than for listening to music.
As for filters, my M-DAC had 7 filters which were hard to tell apart. I just ended up using the one recommended in reviews. My Pathos Converto has no user selectable filters, it just works and, I don't feel as though I'm missing out by not having filters.
the idea behind the filters is that (they are supposed to) sound different hence its like having 4 cd players in one. there were 4 filter settings on the sony cd player i owned and i can remember the 1999 what hifi mag review stating they felt the "standard" setting being the "best". i know of people owning more than 1 cd player hooked up to the same amp - 1 for his rock / dance music and one for his acoustic material...multiple filter settings, tone controls call them what you will would eliminate this. it would be like having a new cd player every time you changed settings...as long as you could hear the differences of course !