IMHO, they were never that great. They had a huge market-share, so they were ubiquitous in big studios but that's not necessarily because of their great SQ. They would be a huge improvement over KRK Rockits, but I digress...
If you are looking for vintage monitors (there are so many great powered and passive models today), I would check out Tannoy, JBL, Urei, or others. IMHO.
GJ