you get a new set of clothes at your mansion near your "street" clothes. Its called "frankie" its a shirt that says "I completed Vice City and all I got was this lousy t-shirt" and in that room to the right of the main entrace of your mansion, where the armor, python, and health pickups are, are three henchmen with uzi 9mm's, and there is a pink thing in front of them and you can have them follow you around. and whatever you shoot they shoot too. And you get 200 health/armor maximums. double vehicle health, and you get unlimited ammunition for all weapons.
so its pretty sweet
oh and those henchmen guys dont die as easily as the rest of your dudes do. they're about as tough as tommy is. they can withstand grenades