RE: props for 40 size 3d
I run a 12.25-3.75 APC on my 46's. They do not have as good a spool up as the 11.5-4 but I feel I have a little better control.
I also like the 12-4 it is a good compromise between the two but the down side is that they are fragile.
Try them all and see if you like them is the only other advice i could give.