DVD-Lab is one of the best out there imho. It's powerful, fairly intuitive to use and has a huge knowledgeable and loyal following in its forums.

Download a trial from here

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Lloyd

That's my opinion. If you don't like it I have others

System: Apple Macbook Pro 17, and an external Freecom 500GB eSATA drive.
Software: Final Cut Studio 2 (FCP 6, Motion 3, Soundtrack Pro 2, Color, DVD Studio Pro 4, Compressor 3), Sonicfire Pro 4.5
Favourite Resources: Findsounds.com, Free DVD menus, Ken Stone's FCP Page, Wikivid