Room for expansion (and future expenditures)
I left the panel very expandable. Room for a portable GPS like a Garmin 796, or an iPad mini next to the radios. Room for another 10" Dynon Skyview EFIS or regular iPad in front of the co-pilot/passenger. I don't need those to get the airplane airworthy and flying.
If I ever decide to get my instrument rating I will probably get some sort of certified Nav/com/GPS on the panel.
I have some time lined up this week with a CFI to get my flight review done. It may take some, since I haven't been piloting anything for 24 years!