I'm a big fan of the DVX 100. I shot my feature using the DVX 100A. You can see a trailer at
http://www.indeliblemovie.com. In my opinion, it is much better to acquire in a progressive format if you are going to finish in a progressive format. You will loose too much information and resolution
by removing the interlacing in post. If you manipulate the camera correctly, the bigger CCD won't be that much of an advantage, especially if you are not doing a 35mm blow up.
My #1 advice ... start progressive, stay progressive!
ps. shallow depth of field