JBL 4311wxa have been my main speakers for years. As old as they are, they still have that powerful, dynamic and accurate sound. If I wanted new ones, I would look towards other studio monitors like newer JBLs, ATC, PMC, or Dynaudio. Most have level adjustments for highs that are so helpful in tailoring the sound to your room.
Of course, most modern monitors are active but there are still some passives available for your high end amp.