Just my opinion, but if you buy the best unit they make, why would you couple it with the cheapest POS that they put out. After using the color and features on my 797, there's no way I would want to sit up front and use a cheap black and white unit with the worst resolution in the fleet.

I doubt that you'll be happy going from the color and resolution on a SI unit and switching to a B&W unit with a 320X320 resolution. I'd give this some thought before doing it.