IMHO the 8200 is also easier to handle than the 2020 markIII. The HF limiter of the 2020 has sort of a mind of its one and that makes it hard to get some transparancy in the sound.
It's absolutely not a bad box, but given the choice I would go for a nice 8200. And before I forget: you'll only want the mkIII... Again: that's all just my opinion ;-)
IIRC, there is no metering on the 2020's HF limiting, so you kind of have to guess what it's doing.