I've found that most anybody's indicator can be used with anybody's nav/com... except for King and a couple of obscure brands nobody ever heard of. When buying a nav/com, buy one with the GS receiver built in, and you won't need a separate costly receiver and rewiring later. You will need to change the indicator and it's cannonplug connection to add GS, or add it all as a second system. Better yet to find a plane already setup like you want (let the current owner eat the depreciation for the radio stack).
There is no "Avionics for Dummies". We're all dummies! Some of us just happen to have learned out of necessity, and maybe due to an interest in electronics.
