720p MP4 Export settings

Hello Forum,

Can anyone recommend decent quality 720p MP4 settings with an MPEG4 container? 

I can only do 720p versions in a quicktime or h264 container which will not play in windows. 

Source is ProRes 422 1080p.  Client requests MP4.  However, the settings for MP4 under the MPEG4 container does not allow for a high enough data rate for 720p.

Thanks!

- Ryan