You may get the GSpot tool from here
With this tool, you can get more information of your DivX/XviD AVI video.
See below for the DivX movie's information:
And the XviD movie's information:
I do think if you are going to convert some movie from one format to another, there is no reason to increase the video's resolution, bitrate, audio's sampling frequency, and bitrate.
So, if the source's video bitrate is 900, to set it to larger value (2000, 3000......) will not make the converted one looking better. As for this reason, to know the source's information becomes important.