We have around 80 hours experience of dual Dynon SV1000 screens in an RV-12 with the 2 axis autopilot and Mode-S transponder. Also linked into the Garmin SL30 nav/com.
We ditched the Jeppesen database for PocketFMS for less than half the price and far better info for UK VFR flying.
Dynon updates come out regularly and give new toys to play with such as the recent autopilot upgrade, data logging etc - all for free. Just download onto a USB stick, plug it into the screens and update them.
EMS pages are user configurable.
Excellent kit, excellent support.