Best AVI output settings in Camtasia 6?



I’m using Camtasia 6, and I have several CAMREC files of about 25-30 minutes that I want to output (produce) to AVI. If I use uncompressed settings I’ll end up with 1GB/minute files, but I have no idea about the other codecs listed.

What should I use to get the best quality to size ratio? My aim is to put them on a DVD, preferably single layer.

Thanks in advance!