I somehow became kind of an NHT bargain bookshelf hoarder, now owning C-1, Superone 2.1 and Absolute Zero.
I don’t really love any of them but for two of my systems I need sealed bookshelves (cabinet and table near wall) and not many companies make sealed bookshelves (rather, most bookshelves have ports).
I rank them C-1, Abs zero, superone2.1 for blues/jazz music that I mainly listen to (although in fairness have very little time on 2.1’s so far). Ymmv
c-1 can sometimes go for about $350 new on Amazon