RB1080 for 803D?

I currently own the 803D. Sorry, I have no experience with Rotel amp, but I have found that you don't need heaps of power to drive the 803D to very high levels. This is based on my experience with using a pair of Marantz SM17SA (60W per channel) over a year. I briefly tried the Marantz SM11S1 which has an accurate power meter - 99% of my listening was less than 5W!!! The highest power that I noted was for the occassional rock - 45W! I have recently upgraded to a pair of Cambridge Audio 840W that are very smooth and detailed. They are rated at 200W per channel, but again it is the quality, not quantity that counts.

That amp is much better than people give it credit for. It's a good choice.

The diamond tweeter is extremely revealing, the Rotel will stand out with speakers of this caliber.

Purely my suggestion, and of course I don't know your budget, but any vintage of Classe Audio amp would be a vast improvement over the Rotel.