I also have the Sony DRUAX with the 2.0e firmware flashed a few days ago.
I just finished burning both a Fujifilm 80 min audio, and a Verbatim Data Life Plus 80 min 32x rated CD-R.
One was using CloneCD, and other was with Nero. I listened to both, and had no problems either burning, or with the quality of playing.
Hearing about your freezing/reboot issue, and you mentioning both programs....my guess is that you do not know that you cannot have both Nero and Roxio installed at the same time. I think it is the Roxio DirectCD that is the main issue.
I used roxio's version 4 & 5 mainly because I was a newbie, and Nero was not as user friendly...but once you graduate and spend a little more time understanding how to use Nero, it is absolutely insane to ever use Roxio again. The speed, power, flexibility of Nero is 1,000 times better than Roxio ever was.
But hey, that's also why there is AOL for people who don't want to learn anything about computers or the internet, and who don't mind having their operating system raped and their extra $$$ AOL account also used for various marketing and promotion targets & spyware.
Bottom line, uninstall the Roxio....and your 2.0e firmware will be fine....oh and don't do ANYTHING on the PC while you are burning CD's or DVD's, unless you have a mega-CPU-RAM system.