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One thing I can assure you is that Perian is not dangerous if you got it from their own website; Perian.org. It is not an application, but rather a set of codecs that get dropped into Quicktime's "bin" of supported codecs. Essentially broadens the support of QuickTime. If you want to mess with Perian settings you can find it under System Preferences down at the bottom.
I use multiple different DVD authoring programs at work but recommended iDVD because you probably already had it installed. The reason it can take so long is because certain video types are more complex to transcode (convert) to mpeg-2 which is what DVDs are.
Did you try my method in iDVD where you click FILE on the top bar, then click ONE STEP DVD FROM MOVIE? This automatically removes menus and should automatically choose quality settings that will fit your whole avi.
In regards to VLC, it is a great program to have installed even if you choose not to use it as your primary video app. It supports a wider variety of videos than QuickTime by default, so it's useful in a pinch. However, QuickTime is still used as a core component by many applications like iDVD, which is why I suggested Perian.
I can't comment on Burn since I haven't used it, but it sounds to be another good option.