Likewise Chad I'm interested in which way to go. I think I might end up being really close to Bill's setup. My setup's going to be the full EFII injection/ignition system - possibly dual ECUs, don't know yet. EFII obviously has the all-electric fuel pump, etc. Dual AFS glass, GNS480, etc. Power's from a single main battery, with a primary alt and a vacuum-pad mounted secondary alt for backup. The AFS screens will have their own backup battery.
I think at one point another guy in the Vertical Power booth at OSH was recommending the Pro. But I'm still kind of scratching my head exactly why, aside from "redundancy".