Is my Amp OK?

You can read all the magazines out there that audiophiles like. 

SS vs tubes and all that crap can be discussed until said "cows come home" but nothing works as good as your ears. 

Take care trusting reviews but use them as a guide to help direct you what to trial.  Everyone hears uniquely, likes different types of music, and what you like might not work for someone else.

What works best with your budget and existing gear?

Take your time to do it right and you won't be upgrading for a long while...

jhv

But do I really need to upgrade?

Of course not

Why?

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.