Not LEO, but know a little about PD cars. Manage and have managed a number of PD fleets including procurement. I'd be totally surprised if the Ford Taurus sedan becomes the patrol unit of the future. It's scary fast, but once you put a cage in it, you simply cannot easily get anyone in or out of the back.
It's so bad, that at a recent well known show, there were at least 7 or 8 at the show, and not a single one had a cage or prisoner seats.
My guess is that the Caprice will fill a lot of the cruiser market, at least whatever the Charger doesn't. Similar platforms, and similar performance. Lots of the officers like the way the Charger looks but the visibility is not great. Caprice is much better from that standpoint.