So you might look at those.
In the Respironics line
Model 260 would be the no data PR S1 Plus that you are using now...single pressure cpap mode
model 460 would be the full data PR S1 Pro CPAP...single pressure cpap mode but also has some limited time with a trial apap mode available.
model 560 would be the full data PR S1 Auto Cpap....has both cpap and apap mode available.
Now if you want ResMed machines....the latest is the S9 model. It has a heated hose option also.
S9 Escape....no data fixed cpap pressure mode
S9 Escape Auto..has apap mode available but the data it collects is so limited it is pretty much useless
S9 Elite...full data fixed cpap
S9 Auto...full data and has both cpap and apap mode available.
The S9 machines have EPR exhale relief...it's different from the CFlex in the M Series and quite nice.
Respironics various Flex options for exhale relief are quite nice too...they don't work the same as EPR works but they still get the job done in a different manner.
Using the heated hose option with either machine allows for more customization of the humidity delivery for comfort and rain out control...