The second option - is absolutely non-standard configuration of transcievers, transponders, gps´s and what was available at the time of overhaul or restoration of the airraft concerned. I think, 8-9 of 10 Moravas use some type of Bendix King aviation.
So - the final solution is only upon you. The avionics, as to my humble opinion, is not the essential feature. You can choose the "historic panel" - with one or two "LUN" transcievers (and even more typical historical ADF (RKL 41/C - http://v-mot-9.kvalitne.cz/mid/M24.jpg , if there is something like this available for FSX) - or the "actual version" - with standard western avionics.
