A friend and I have bought our -4 together, and luckily we both felt the same about our panel. It was full of old vacuum instruments, a VOR and other stuff we felt we'd never use. And so we set about doing a new panel.
Victor uses the plane for local aerobatics mostly, whereas I am mostly doing formation flying with the occasional cross country trip. All strictly VFR. And so we figured we didn't need glass panels. One simple EFIS to have a horizon, plus some reshuffling of the basic round dials that came with the plane. Add Mode S transponder and 8.33 kHz radio (both mandatory here), plus an iPad mini to tell you where you are. Who needs more?
So we put a new panel in CAD, had it CNCd and powder coated, moved the switches to the side panel, rewired 80% of the aircraft and came up with this.
(before and after pics