Yet another struggle, the #2 Nav/Com is struggling and I think it's time for replacement (Narco MK12D). Plane currently has GTX335 ADS-B out/ KX-155/ MK12D/KLN-90A/PS7000B setup. Looking for the best approach to get rid of the MK12 and get LPV at the same time. Garmin 430W used? Just suck it up and get an IFD440 or GTN650?