Suggestions on Pre Amp/Amp or Integrated Amp

One of the bedrooms in our home is being used as my wife’s sitting room.  She has a LG OLED TV, Marantz NR1510, B&W CM8 S2 floor speakers, HTM72 S2 center, SVS Ultra Bookshelf (used as rear speakers) and SVS SB2000 sub.  I would like to upgrade the receiver.  She mostly watches movies, shows and some music.  Budget would be $5000.  What would be a better Pre Amp/ Amp or Integrated amp?