By "monitors" I mean the colloquial definition of the term, i.e. small speakers designed for use with stands or placed on a bookshelf.
Beyond small speakers, I'm not looking for anything specific, I meant this thread to be used for informational purposes, and didn't want to narrow the criteria too much.
Thanks for the suggestions so far. I've updated the OP to include speakers from the 80s, as that is when I consider the beginning of "modern" speakers, i.e. computer designed with advanced materials.
I'm liking blueshadow's NHT SB3 recommendation. NHT is a great, no-nonsense brand that I had forgotten about. Similar to EPI in the 70s, great sound for a reasonable price. Admittedly I intended the focus of the thread to be on the speakers originally in the $2000+ range but which have since become much cheaper, but for small speakers at that price I think the high price buys you better build quality and finishing rather than better sound.