Being quite proficient with the GNS430, I use it for both VFR and IFR, coupled to HSI and autopilot.
I have a 96C at hand, with the route in (pre-flight planing...) ready for the dirtiest emergencies. I usually store it in the co-pilot seat pocket, together with the handheld radio that I use to copy IFR clearances. These two can be quite helpful if all electrics quit while IMC...