Quality -- resolution and color

Greetings,
I burn DVDs often and find that always the resolution is blocky and far below the DVD standard 720 x 480. Is this just the nature of this technology, or can I do something different?
Also, do you all boost your color and or diminish your luminance in Final Cut before compressing and burning DVDs? If so, is there a set of values to use in the Color Correction filters? I always see a more burned out picture after processing of video for DVD.
My process is:
Edit video in Final Cut Pro -- Original footage is DV or XDCAM 1280 x 720p (16:9)
Save as Quicktime file
Import to DVD SP
Build and Format using DVD SP default compression
Play in Apple DVD Player
If this has been covered, please point me
Many thanks!

David,
Thanks a lot. now I realize my bit rate is set to 4.0, that could be causing the blockiness.
I googled around and found that a bit rate of 9.3 for all data, video and audio, is going to play on most DVD players. (but I doubt it)
I hate finishing a project and mailing disks and having a client call and complain that his DVD is skipping or freezing.
I will move to Compressor and experiment.
I am interested in what anyone else calls a best "bit rate" and a "highest bit rate"
Second question though is anyone tweaking their video in Final Cut to make it look better on a DVD--namely bringing down the luminance? I have done this, but it is difficult to maintain two video sequences of the same program when it is evolving.

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