Grin... what Stan said, at 5:13 AM while I was still sleeping
I export AVCHD to Widescreen DV AVI since it has all the quality that I need... but I am NOT doing work for pay, only for family video http://forums.adobe.com/thread/652694
For me, the DVD's I make now are much better than the ones I made when I had a tape camera captured through a Pinnacle DV500 card... since the AVCHD I start with is much better than what came off the tape
For you... you may want to export to a lossless (and very large) file as Stan suggests and give that file to Encore... or do the bit budgeting yourself and export from PPro to MPEG2-DVD
Actually, you may want to do a test using both procedures... and see if you notice a quality difference between your calculations for MPEG2-DVD and the DV AVI route