None of those three options is particularly bright. Tonally, they are exactly what you are looking for. I am not sure that Rega is the best option because I have read it struggles a hair with lower impedance speakers but I do not have direct experience with that. That would be my only caution. I am not recalling where I read it but for some reason I am thinking that sub 6 ohm speakers are not ideal.
There should be no matching issue with SimAudio or the M33.
The other option you could look at it is Naim. Both the Supernait and the Uniti series are shallow and tonally spot on what you are looking for. The latter of course has built in streaming capabilities.
I like Naim because it thrives with low impedances due to its matching with Focal.
Full disclosure, I am an NAD and Naim dealer. I have no relationship with Rega and Simaudio other than I am a happy former owner of a Brio R.