Well I cannot really give you any idea what the 9200 will sound like. But I can tell you that I just replaced an SA-102 and Electrocompaniet EC 4.7 with the Radiance 200i. It's phenomenal! It has amazing amounts of power. It's very hard for me to believe it has more power and control than this beastly 90lb. amp with 2x the power supply. But it does, and it leaves one with no doubt who the more powerful contender really is.
I recommend the Perreaux as highly as anything I have ever heard. It has more power than the 8200 MkII, and has 2x the transparency, and detail of the 8200 MkII. More transparency, and detail than the SA-102 even. And it has similar sonic character to all three. It's very tube-like, and very pretty sounding.
The SA-102 might sound a bit prettier, and a little more refined, but this is at the great expense of control, and power. IMO, the 5% difference in refinement < the 200% increase in power, control, and the 50% increase in transparency.
I hope this helps. It may just confuse you MORE. . LOL!
B