I second FA's comments. The DA40 is quite easy to fly and if it is a oil burner things couldn't be more simple. You may need to get used to the prop/engine combination, especially if you are the sort of person who plays with the power level a lot on final. It isn't difficult, just slightly different in the way the combination responds to your demands.
Turning to the G1000, you could probably hack the PFD and comm panel in an hour or so. Things get far more interesting when you start playing with the MFD - Personally I think a bit of serious book reading and PC training should be compulsory. OK, you could use it like a GPS496, but then you are wasting a lot of functionality.
Oh yes, there are a couple of gotchas with silly little things like ADF freq selection; just the sort of stuff that would spoil your day during an IR examination.
