I posted this a week or so ago and received only one off-line response (a former AA captain going dual electric).  I'm still debating this in my own mind for my ES, so I thought I'd try again...

I am interested in builders' opinions about having all electric gyros instead of the more standard system with vacuum driven heading and attitude indicators and an electric turn coordinator. Specifically:

1. What are most folks doing in their planes?

2. How much redundancy is required in an all electric system for it to be as safe as the "standard" vacuum/backup-vacuum/electric system? (By "standard" I mean vacuum driven heading and attitude indicators, the precise flight backup vacuum system, and an electric turn coordinator.) Are vacuum systems so unreliable and the manifold driven backups sufficiently undesireable that even a system with one battery and one alternator is preferred? One battery and two alternators? Two batteries and two alternators?