I've used an FRFR solution for some time, but wasn't that convinced by the tone I got, there was always missing something.
It was a GSS FRFR 12+6 coupled to different pedal preamps : MarkBass Ground Stereo Pre (Alain Caron Signature), TrickFish Trilobite (twin Mike Pope Flexcore) or BassLab Step About (Greg Howard Signature).
I have severe back problems with a full official and medical recognition of my condition.
So, I ended up with a brand new generation GR Bass AeroTech Full Carbon 800 Combo (800 Watts/4 Ohms or 450 Watts on its own with a 12 inches speaker + tweeter), weighting ... 8.2 kilos and for more power, if needed, I also bought the brand new generation GR Bass AeroTech Full Carbon AT112+ (450 Watts/8 Ohms, same speaker configuration) weighting 6.3 kilos.
When I received them by courier, I thought they forgot to put the combo and the cabinet in the boxes as it was so light...
Now, it sounds the way I want.