@bluesilver
For comparison - I have a 180mm Russian Intes Micro Maksutov that visually slightly out performs my Japanese 128mm APO.
BUT the Mak has cooling vents at the front and a cooling fan at the back to remove warm air from the entire system and it also clears the warm boundary layer off the surface of the primary mirror - absolutely essential if you want to get the best out of a Maksutov design without waiting for hours for it to cool.
If you can find an Intes Micro Mak then it would be worth considering as once cooled they are very sharp - although they are expensive.
However - as others have said try an off axis mask made from cardboard on your Newtonian and judge the results.