Mike, you are going to have to put the "blinders" on regarding your panel. New gizmos come out all the time. If not, you can really chase your tail keeping up with everything that comes out.
Its incredible what has transpired in avionics since I designed/built my panel, and that was a scant 5-6 years ago. Bottom line is you will enjoy what you have designed no matter what comes down the road.
Then again, there is always the option of a panel upgrade!
