I have been following your other post. I believe, given that you currently own and enjoy a system, that you explore the speaker market prior to changing out your amp. In your price range there are many moderately sensitive speakers that can be driven by your Rotel. The Marantz amps you are considering are very good products in there price range, however don't provide a great deal more power than does the Rotel, should the need for power arise (do to speaker choice). If you find you need more power to drive your new speakers without strain at high volumes you then can search out another that not only provided the needed power but is a sonic match to your speakers and tastes as well.
Many excellent speakers have been recommended. It seem that you can audition many of them. Do so. Good luck in your search.
Many excellent speakers have been recommended. It seem that you can audition many of them. Do so. Good luck in your search.