They do own Rotel and Classé.Bowers and Wilkins doesn’t make a lot of money by selling amps and sources, yet they recommend investing only one third of your total investment in speakers.
Now if you are talking about a full systeem, pre amp, power amp, cd player, dac, streamer, turntable, phono pre, ... The speakers shouldn't be over 1/3rd, but that's not really the case here.
So get the R3 if those are the speakers you like, get a 2nd hand amp on the cheap, or an Aiyiama/Topping/..., and enjoy the R3's. It will already sound so much better than the soundbar.