A few thoughts:
1) How well do the A04 cope with unbranded media certified for X2 burning. It seems that the A03's firmware preventing x2 burning on pretty much any media apart from Pioneer ?
2) It seems the Retail version is a good deal when you factor in the Pionneed DVD-R and DVD-RW included. These retail for $30+ no ?
3) As for backing up DVDs it IS quite a bit of work especially if you want to keep the same look as the original one, i.e. menus, chapters, audio selection, extras, etc...unless of course the whole thing fits onto a 4.3gb (4,700,000,000 bytes) DVD-R. Very few movies fit that bull. As a previous poster said, you have to reencode with Rempeg and rebuild the .ifo files, etc...On the other hand if you just want the main video and one audio channel, then that's fairly easy.