Copy other panels, not completely but a combination of all the panels you like. Then go to Complete Avionics on the Gold Coast to do your loom. Work out what you like and don't like. G3X was non negotiable for me, GTN750 etc. It all falls into place if you take your time and don't listen to the bull**** from others that have put stuff in, realised its crap and try and talk you into doing the same so they're not alone.