In reply to:
In my research it seems that the SR22 Turbo does not perform any better than the SR22 at non-oxygen altitudes (< 12,000 ft). Are there good reasons to buy the turbo if I don’t expect to fly with Oxygen? Or should I save the $60K price difference?
Your information is correct: the low-altitude performance of the two planes is comparable. Your second question - should I buy a turbo even if I mostly fly low - is more complex. Cutting through the pervasive quasi-religious posturing (available in its richness to members on COPA’s Member Forums), it boils down to this: if your projected mission profile is utilitarian rather than recreational (i.e., if you routinely fly to get places more significant than airport hamburger joints) a turbo provides significant flexibility. This is apparently true even if you’re a flatlander. But this simple touchstone is complicated by your comfort with cannulae, your individual baseline oxygen usage, your personal risk aversion, peculiarities of the TN-22, etc.
Airplane ownership seems to have as much to do with the id as it does with empirical truth. But if your purchase decision stands to be influenced by actual Cirrus user experience, I suggest you join COPA and trawl through the rich trove of posts on the topic. Separating signal from noise, I leave up to you.
PS - I have assumed from your ID that your name is Hamid. If not, I apologize for the presumption. If yes, then I should point out that Premchand’s miracle of a short story about a boy called Hamid - Idgah - contains a wonderfully germane metaphor for making cost/benefit decisions like yours! The translation from Urdu is clunky, but I’m unaware of one better.