I may be off here because I’ve only done a few projects so far in PProCS3, editing several events with large sequences (over 1 hour). I am not sure I like the quality of the direct-to-DVD workflow result thru PProCS3 as well as my old way of DVD production, exporting the uncompressed sequence from the NLE and then rendering to mpeg2 DVD format with TPMGEnc. I did this with Avid Liquid and was happy with the result.
I am still experimenting with the DVD production thru PProCS3, but I regularly export large sequences >20GB uncompressed without problems.
Fumbling my way happily thru the world of HD…