Garmin 296/396/495 is your answer.
Have two of everything. The IFR trainer I did my CIR in only had one A/H, which while legal is not so nice when you are doing night Navs in IMC for real
and S/E (yes Wally I hear ya) and you have no idea of the Vac pumps histiry!
Could we have survived a vac pump failure..sure...in fact I seemed to fly VOR's better without a DG and A/H
but had it been my aircraft two of everything please!
Jabair has a MEL that requires two functioning everything for IFR ops (yeah I know Wally its only one donk) and just like ForkAir Multiple GPS whether TSO'd or hand held or PC based are encouraged!
I bet you get some stories from the folks that will make us all want to walk in future!
