I would consider the Cirrus 'chute to be similar to a reserve for a skydiver.
The instruction for a parachutist is very simple. If you have a problem with your main, try to deal with it. The very instant you realise you can't deal with it, panic sets in or you have any doubt whatsoever, get rid of it and pull your reserve - that's what it is there for.
Without doubt, no matter the reasons why, if I was in a similar situation in a Cirrus, I'd pull the reserve - end of.
Afterwards, people could argue why they would or wouldn't have done similar, I probably wouldn't care.
The stupid thing would be to die in crash and have people ask "Why didn't he pull the handle..?"