I have an 451@832 with CG3G.
The CG3E was slowing my drive down, while CG3G did not. And G burned the disc a little better too.
To the topic poster, I would keep the fw. I mean, that scan is almost perfect. If you do want to try another fw, save the EEPROM before flashing a new fw into your drive. Not satisfied? Put everything back on
And that with Prodisc... Some people get all the luck