I've been farting around with Quicktime with the mp4 codec in Vegas. Is that the same as h.264?

Imo, videos encoded in mp4 have a terrible quality to files-size ratio compared to Windows Media. To get anywhere near the quality of a .wmv with .mp4 you have to nearly double the file size.

I know it's not a popular format anymore but Real Media has the best quality to file-size ration of any format... by far!