...the search for dome video continues...
I found some interesting links this evening:
Two threads talking about using machine vision cameras for cinema. This is basically what SI are doing, and it looks t me like they have better more 'camera' like control software.
The 'Pike' looks interesting from AVT, meant to be priced around $5000 - but it has a 1" Sensor.
I downloaded some video from http://www.arecontvision.com - they have a couple of 180º/360º cameras, but also the AV2100 which is meant to be under $1000 - the footage is remarkably good - definitely better than a Sony Z1