RE: Master Airscrew or APC?
I have owned both as well and in my opinion and as stated above and the black MA is good if you plan on a few rough landings & thats about it. From what I've noticed you will get a few more RPM's from the black MA but no bite in the air and will also get alot of flex at the tips along with louder engine noise. With the same size APC I have noticed the engine load to be a little heaver, the pulling power a little better and less engine noise.
This is just my opinion and as you get time & experience under your belt you will come to have your own preference & opinions for props.
Steve