Ok Mr Newb here...

I have purchased the Creative Zen Vision: M 30GB Video/MP3 Player.
Video Support Formats (DivX™ 4 & 55, XviD5, MPEG-1, MPEG-2, MPEG4-SP, WMV9, Motion-JPEG)

I am looking to convert some of my movies to play on my player.

I used DVD Decrypter to copy a whole DVD to my hard drive.

My Questions are:

1. Out of the Video Support Formats I listed above, what is the best quality vs smallest size format to convert to?

2. What is a good conversion program to convert to your answer of qestion #1?

Thanks in advance
SS_VIDEO_NEWB