If you mean the D300 surround and center, those speakers can't play anywhere near reference level from 10 ft, let alone 15 ft. The recommended peak power for the D330 towers is only 120 W.
If you want to get the best put of them, I would recommed the AVR-X3800H, or Marantz Cinema 50.
If you won't ever go over volume -20 (relative scale), that is 60 in the absolute scale, then the avr-x1800h can do it too.
So can that JBL, but the x3800h is way better in almost every way.
Again, avrs are not rated for 4 ohm based on traditional ways, but in your use case with the D300 series, the avrs mentioned are fine.