The plan this year for my -4 is to upgrade panel to include G3X, 7" cause it will fit better in the panel but gets too busy with all the info. I am considering replacing current MGL Blaze with a JP Instruments EDM 350. It's a bit more costly to do it this was but there will be enough room to get radio and transponder up there as well. Any thoughts, helpful hints, etc will be appreciated. Rick