Both Nero9 and AVS are decent software and provide good results (I have them both), here my 2 cents.
I have found Nero9 to be superior for a number of reasons, it seems to fuction better with less crashing. Obviously it is more focused on a specific task and overall does a better job. :iagree:
AVS4YOU is a suite, it does more. But it has 2 major downsides, first it crashes from time to time and the 2nd more serious issue, sometimes it won't work and will fail software authentication. If you are a user that changes your hardware (swaps drives, adds or deletes) the software will complain about being installed on more than 1 computer. It will then stop working and invalidate your license. At that point your dead in the water an the complete AVS4YOU suite is useless until you can contact them to get it reset.
This apprears to be a known problem that AVS just can't or won't fix.
I can honestly say the edge goes to Nero9 (and I end up with less coasters)