Glocks are what i trust the most and they are proven durable and reliable(search youtube for the videos), I have a Glock 23(.40 compact) which can be conceal and still pack a punch so that is why the .40 is becoming a popular law enforcement round. but like most experienced shooters say you have to go to the range and test out different types of pistols and ammunition grain(yes it can have a effect such as recoil and shot placement)...to make it simple i would go with the pistol you are comfortable to shoot and accuracy will come with training.