What country do you live in? The reason I ask is that in some countries there is a big difference in cost between a fixed pressure machine and an auto machine. In Canada the difference is low. For example at one on line store the fixed pressure ResMed AirSense Elite is $750 ($CDN), while the automatic AirSense AutoSet For Her is $780. At that low price difference it makes no sense in my opinion to buy the fixed pressure machine. The Auto machine can be easily set to fixed pressure mode. In fact that is what I am currently doing with my AirSense AutoSet. After running it in auto mode for 6 months or so and I determined what pressure works best for me, I have switched to fixed pressure CPAP mode. Now if you are living in a country where the difference in price is much larger, and you know what pressure works for you, then you might want to choose the AirSense Elite. It still captures detailed data on the SD card which can be viewed in SleepyHead. The more basic AirSense CPAP does not capture detailed data -- basically a brick.
If you are going Auto, my thoughts are that the ResMed machines have a few advantages over the DreamStation. The ResMed A10 machines have an auto ramp feature that maintains a constant go to sleep pressure and then ramps up to the minimum therapy pressure when you actually go to sleep. The ResMed machines also allow the option to use the EPR function in the ramp mode only. Your S9 does that too, but I don't believe the DreamStation allows that. You can often run lower pressure when you only use EPR during the ramp but not during sleep. And in the ResMed Auto machines there are two versions, the Standard and the For Her version. I would choose the For Her version. It does everything the standard machine does, but also can be set into the For Her auto mode. The For Her mode is more likely to work for someone using lower pressures. But the good part is that it is a selectable option. You can use it or not. The price is the same as the standard machine.
Hope that helps some. Any questions, just ask... My wife uses the S9 Auto, and I use the A10 AutoSet.
i am in saskatoon canada thank you so much
That is good news when you are buying a CPAP out of your own pocket. When you consider the $US exchange, we can get a ResMed Auto for the equivalent of $575 US. That is lower than you can get it for a new machine in the US.
On a quick look, the best price I can see on the AutoSet For Her package with a heated ClimateLine hose is $810 less a $25 with the discount code, or a total of $785 with no tax. Unfortunately the heated hose for the S9 does not fit the A10 machines, so you have to get the new A10 hose if you want that option. I have bought from this company and they are good to deal with. See this link:
As a comparison the fixed pressure AirSense Elite at this same outlet is $755 with the heated hose, and $25 discount. So you are getting an Auto machine for $30 more than the fixed pressure machine. Makes no sense to buy the fixed pressure model.