I would say that's about my setup for most stuff: iMac G5 to Pioneer 110 in LaCie d2 case and NEC in a PocketDrive case. Multiple Firewire ports are the best.
I will agree that toast is an almost must have general utility. That and rpc1 drives. Toast on PPC seems to have a faster burning engine that the os so I use it for pretty much everything. Even if you use drutil, you get a longer combined time of burn and verify that toast. mkisofs + hdiutil is a lot longer. Being able to take your favorite audiobooks and play them in any dvd player, or make a large mp3 collection, is another plus. For making backups of your dvd's, as this thread implies...
IIRC there are about 3 dvd compression applications that have free trials. I don't think Roxio has that. The Roxio rebates are notoriously problematic, if you have problems making a purchase or update from there then email or call customer service.
Take a look around for coupons or discount codes because Roxio/Sonic whatever hands them out like candy (read too many 'easy creator 8' 'last chance to upgrade' emails).
If I had one of the current in-built MatshitaDVD-R drives (which I unfortunately do), and didn't have any authoring/burning utilities or other hardware then I would look at the LaCie DVD Burner with Toast:
http://www.lacie.com/products/product.htm?pid=10113
not the cheapest, but it's a decent bundle and their support is good.
Just thought I'd throw that one in for anyone interested in this thread..and no..I'm not pushing either of those products.
Good Luck,
-j