Rotel RMB-1575 and RSP-1572 versus Integra 40.6 re

I currently have the Integra 40.6 receiver and was thinking of getting the Rotel RMB-1575 and RSP-1572. Will I really hear a difference when listening to music and movies? System is used 80% with movies. Speakers are in ceiling Totem TAW 6.5's front and rear. Any input or recommendations would be appreciated. Thanks.
For in wall/ceiling speakers, it probably wouldn't be worth upgrading. If you have regular bookshelf/floorstanding speakers, then yes, it would be a nice upgrade.