Steve, 5300 rpms on the 3W 32x10 is fine. The prop is a HUGE load and my QS150 turned it the same so don't fret it. Personally I'd go with a much less loaded prop. If sound is an issue try a FUCHS 32x12 (mine tachs 5800) or even a FUCHS 33x12. A Mezlik 32x10 would be good too and cheaper. But again the 3W 32x10 is a very heavy load for your motor. Mine is hanging on the wall until my 3W157 arrives and even then I won't run it until the motor is well broken in.

Rich