Is my Amp OK?

See my earlier post. Additionally I just checked the output level of your DAC and there is no chance that the DAC's output will clip the Rotel's input. You are absolutely fine with this much clean power.

willemj, not trying to get into a debate or anything but you seem to be convinced that all "good" amplifiers sound the same. Just out of curiosity, can you please list the names of these so called good amplifiers that you have owned or auditioned extensively, and compared under the same identical conditions? Many of us seem to have a different experience and wondering why that is the case. Thanks.

I think that quite possibly the quality of your speakers and that of your DAC might be of superior quality than your Rotel amplifier.  Revel and Cary I believe are generally of a superior quality than Rotel audio products.  So maybe an amplifier upgrade should be considered.

“I think that quite possibly the quality of your speakers and that of your DAC might be of superior quality than your Rotel amplifier. Revel and Cary I believe are generally of a superior quality than Rotel audio products. So maybe an amplifier upgrade should be considered.”

that’s what I am thinking. But what do I upgrade to?

No speaker is ever better than a decent amplifier. Frequency response of even the best speakers is at best within +/- 2dB for the central part of the spectrum. Good amplifiers stay within 0.2 dB, or even far less. Distortion figures are a similar story.
The explanation is very simple: speakers have mass that can resonate, is slow, behaves in a non linear way etc. Good amplifiers have been sonically perfect for decades, and cannot be distinguished from each other in a double blind test.
See here for the classic and legendary test: http://www.keith-snook.info/wireless-world-magazine/Wireless-World-1978/Valves%20versus%20Transistor...
And here for a hilarious one: http://matrixhifi.com/ENG_contenedor_ppec.htm
If you google you will find quite a few more.
I personally attended a private demonstration by Quad's designer Peter Walker. He had this set up where you could listen blind to his three famous amplifier designs (using studio master tapes). I thought I could hear a difference, but he just grinned: I had been no better than random. That was a lesson learned.
There are a few proviso's and I have listed those in my earlier post. If those apply, there will be sonic differences because one of the amplifiers does not meet the criterium of 'properly designed and used within its specification'. This is why many tube amplifiers fail the test.
If that is not the case, the perceived sonic differences are the product of level differences (the brain interprets louder as better). For a listening test levels should be kept within 0.2 dB, and that is such a small difference that you can only achieve this with a decent Volt meter (and not with an SPL meter, let alone with a smartphone app). Did you ever see a dealer equalizing levels in the demo room using a Volt meter?