Give the F & P Simplus a try. A great mask and works well for me. I have tried many and this was by far the best.
Hi all, The Quattro Air certainly did it for me, like you had tried a few without sucess, started with Pillows untill also found I was a mouth breather at times, then went the Amara Gel and that was sheer hell, then the Quattro Air and its been great nights sleep since with very little leakage, and AHI of less than 5, started with AHI47.8.
I really like the Quattro FX and it is really the only mask I use now, but it is a really hard mask to tame and get adjusted right. I battled it for weeks until I got it figured out, but once I got it figured out I can't find anything to top it. If I had it to do over though, and as a recommendation to anyone who doesn't particularly want to do battle with a full face mask in order to get it to work well, I think the newest incarnation of the Mirage Quattro is definitely worth an early try-out. It's a pretty good all around FFM and I found it very easy to tame and adjust the leaks out. Really, the only reason I went back to the Quattro FX from it is that the forehead support is really hard for me to accept when I know I can get away from it with the Quattro Fx.
One thing to consider: the right size mask and the right size headgear aren't always the same. I don't have any problems adjusting leaks out of a Medium Mirage Quattro with Medium headgear, but with Quattro FX I have to use a Medium Mask and a Small headgear in order to get the mask to seat properly (or a Medium headgear with a few strategically placed staples). The reason for this is that without a forehead support, the straps pull back at an angle rather than straight back and since they are angled it is imperative to get that angle just right for it to float properly.
One good trick to try with the Quattro Air is to fit it lying down with the Mask Fit feature on your S9 auto. It tests the mask at your maximum pressure. This way I tighten the straps a bit more than I would have on starting pressure. This prevents you from waking up when your pressures go up and the mask starts farting.