I got an expensive FRFR branded speaker about a year ago. See here if you are curious (few were! 
): NGD: Line6 PowerCab, questioning if it is working properly
I was not happy with them marketing it as FRFR when it clearly wasn’t. HOWEVER, I am very happy with the sound of it. I needed to flatten it myself with an IR, but that is fairly easy. but, I don’t use that except for very rarely. I notice that I prefer to use the built-in speaker models rather than the FRFR. I tend to only use about 3 of them depending on my goal, and I do not often use the cab models built into my processor. I rarely use it loud enough for folks outside to hear, but I COULD take it to a gig if I ever get that far in my playing.
I watched Justin’s video on his studio setup and he had a speaker on the floor that is a fairly inexpensive FRFR speaker - $200USD I think. It has a lot more power than I cared about but would have probably been just fine and saved me a fair bit of cash. see it at 1:40, the Headrush on the floor - I don’t recall him talking about it. https://www.justinguitar.com/guitar-lessons/youtube-setup-a-tour-of-justin-s-studio-jr-002
One more thing - I have tried playing through a good sound system, surround system, small (4 inch) guitar speakers, the powerCab (12"), and a fender 12-inch cabinet. The ones I like best are the the larger diameter speakers designed for guitar use. Those sound right and create a more active ‘feel’ in the room.