I am not a big fan of Vegas 6. I have had it since its release, but was sorely disappointed by its failure to address long-standing deficiencies and problems; by its failure to add features that significantly improve the editing workflow; and much more. I've have ranted enough over the past year. No use adding more now.

Here is a link to the list of new features added:

Vegas 6 New Features

The "big news" features were:

Media Manager, a feature that some people swear by, but most people swear at. It is the definition of bloatware. It is larger than Vegas itself.

Nested VEG files, which is truly a fantastic feature. This DOES make a big difference in what you can do. It was the only feature in Vegas 6 that actually showed creativity and pushed the program forward.

HDV support, but this was actually added, to some degree, in Vegas 5. However, it has been enhanced in the interim updates to Vegas 6.

Thus as far as Vegas goes, if you do HDV, need Media Manager, or want nested VEG files, then you should get the update. If not, then the other features (listed in their entirety below) are pretty thin and not worth too much.

However, DVDA 3 is a different story. It dramatically improved what was in DVDA 2, and fixed many serious defects. DVDA 1 & 2 were programs with serious problems and were difficult to recommend. By contrast, DVDA 3 is the "coming of age" release. I highly recommend that you upgrade.

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Vegas 6 new features (entire list)

Video
* A/V synchronization detection and repair
* Full-screen preview to a secondary Windows display (including DVI monitors)
* Ability to save keyframe presets in the Track Motion and 3D Track Motion dialogs

Audio
* Option to ignore fact chunk when opening compressed WAV files
* VST effect support
* Playhead timeline scrubbing
* Broadcast Wave Format (BWF) import

Workflow
* Support for nested Vegas projects
* Ability to save a project path in a rendered file and edit a rendered file's source project
* Media Manager window
* AAF import and export
* Multithreaded rendering
* Ability to display fade lengths between selected and nonselected events
* Regions and markers that occur at the end of rendered file are now adjusted so they occur on the last audio sample of the rendered file. If you're rendering the loop region only, any region that extends beyond the loop region is adjust so the region end occurs on the last audio sample. This adjustment prevents warning messages when the rendered files are opened in Sound Forge software