Great new Props from HQ that are also popo compatible for those running the quick swap shafts.
they also work fine on normal M5 Motor shafts so compatability is not a problem.
If the HQ 5.1x5x3 were a bit too much for your motors try this 4.6 pitch.
Just check if the 5.1" diameter will fit your frame as they are a little bigger than the standard 5" tri prop.