I was thinking more along the lines of a military turboprop, such as a Tucano, which will carry about the same amount of energy into a field
Never been in a Tucano then? Weight and energy, even without the Turboprop running is vastly more than a Cirrus, sorry.
It is policy in the military to only use the seat when all other avenues of recovery have failed. The effects of the 'bang seat' are not pleasant even with the new seats, the rocket seats screwed your spine and thus were most definately a last resort!
The Grob had, in the past, along with the Firefly, problems with spinning in which case it was recommended (to students) to use the parachute in the event of inverted or high rotational spin. In recent times Grobs with thrown prop blades and engine failures have been successfully 'dead sticked'.
The entire debate is a non issue as the decision to either dead stick or abandon/go for the chute is down to purely personal faith in ones ability. No blame should be proportioned to the chaps decision as I'm sure there would be lots of posts of 'idiot' if he had the system, didn't use it and screwed the forced landing up resulting in death or injury.
Can't win.