What are you waiting for?
Mate the G1000 van is just as good as any other C208. My opinion is that the G1000 avionics will make for an even safer operation as situational awareness and dual everything will be appreciated by all your pilots. Show me any aircraft of any vinatge that does not have the occasional avionics problem. To date Garmin have been very reliable and parts readily available if required.
Groggy