I'm thinking that the Dirty Harry gun looks a little more scary and intimidating than the Sonny Crockett gun. If you have that gun, you seem like you'd be a little more dedicated to being a killer.
This sounds correct. I'm looking for crockett, but black instead of silver
it's been awhile since I have been in the game, but my recco's would be a Smith and Wesson M&P in .40 or .45, or a Springfield 1911 in .45.
you could also get a taurus revolver. revolvers are more reliable and easier to clean than pistols, and imo, are more fun to blast inanimate objects with.