Interestingly enough, the Columbia 350/400 is available now in either Avidyne or garmin G1000. Also the ADF is also availble from the distributors as an option, approx $10,000 and actually looks pretty neat as there was a lot of empty space on the right side panel.
The Garmin G1000 screens are switchable so no loss of any info and of course in the Columbia there is no redundancy required for an alternator failure.