JB I wouldn't get rid of the 45 to get a 40 just because you see so many carried by those with badges. Most law enforcement who carry 9s or 40s do so because they are required to by policy. Nearly too the man, the gents I know well in the military and tact squad law officers MUCH prefer the superior stopping power of the 45 vs either of the other two. In manners of gun, caliber and defensive bullets I take the recommendations from those who are shot at for a living!!!
Regardless of caliber, the two most preferred bullets I have seen by those same buddies are the Golden Saber from Remington and the Federal Hydra Shock.
My 1911 is full of Hydras,

RA