First of all, practice with your revolver so there won't be any regrets when you've got the perfect shot.
Second, if you were using a rifle I'd tell you to go as heavy as possible, 180 grainers, but out of your revolver the 158gr. bullets will do fine.
I'd go with the hollowpoint; the XTP, Gold Dot, Fusion, all great performing bullets. However, if you can find a 158 grain hard cast with more velocity than the hollowpoint offerings, then consider using those.
I am a big fan of Buffalo Bore ammo as well, and currently use their .45 LC loads intended for use only in rifles as well as their heavy .35 Remington. Never an accuracy problem with anything they produce, and you can buy 20 rounds of their pistol ammo at places like Cabelas, Sportsmans Warehouse, and similar stores if you have them in your area.
Good luck and keep us informed on how you do.