Another great option is the
iFly740.
I considered both the iFly and the Garmin 660. The are comparably priced and are both great products. The iFly is a bit larger and has a iPad app that works exactly like the GPS itself. You can try it out for free before you buy. The customer service at iFly has been outstanding.
I replaced my Garmin 396/Airgizmo mount system with a simple aluminum plate and Richter mount from
ProClip. The solution came out great and fits nicely in my panel.
Here's a few pictures of my set-up.
