Too bad it costs about $71,000...
and that doesn't count installation. It's a damned cool implementation, combining synthetic terrain representation with a EFIS and Flight Director display. It's way out of my price range, though. If I were buying a new plane, I'd like to have a system like that.
Now, if I ever break down and build a fast homebuilt, something like the Horizon EFIS is more like it for me.
Failing that, there's always Blue Mountain Avionics. They make some pretty interesting stuff, too.