Rich, I read with interest your comment about difficulty 'unseating Preps'. I don't think you lack vision, just data.
Last Friday a press release went out explaining that we've just sold the 1,000th license of Metrix, our job planning & imposition system. About 90% of those Metrix customers replaced Preps with Metrix.
If you look on the main page of our website you'll see a list of customers that we've published profiles on. Most of them were using Preps before purchasing Metrix and they haven't turned back. Download a few and have a quick read - very compelling. Japs-Olson is one example of a very long-time Preps user - they said their only regret in the decision to drop Preps for Metrix is that they hadn't done it sooner!
We have customers with Rampage, Prinergy, Apogee, Nexus, and many others. Metrix works wonderfully with pretty much any prepress system, connecting either via JDF or imposed-PDF.
I worked for many years on the Preps team at ScenicSoft, Creo & Kodak, I can attest to what a great piece of electronic stripping software it was, but, as you've said, it's about on-going innovation. Metrix is what people graduate to when they've run their course with Preps ;-)