I wouldn't fly a Cirrus in the South without air conditioning.

I know a bunch of Turbo owners say you don't "need" AC because the airplane climbs very well into the upper teens where the air is cooler...but for <150nm trips its pretty much a necessity, especially if somebody expects to get out of the airplane in 90 degree weather and head to a business meeting without first showering/cleaning up and changing clothes.

Its also mighty damn uncomfortable on the ground, even taxiing with the doors open and power pushed up for additional airflow.

Now, I have no idea how effective the portable Arctic Air ice chest setups are...that might provide the best of both worlds in terms of maintaining useful load when you don't need it and being cool when you do need it, but they look like they take up a fair bit of baggage space which may or may not be a concern.