Cams
I'm no fan of a cam designed for sound. It's like flipping the air cleaner lid (on a car thus equipped) upside down to get the "WWWAaaaaaaaa" sound. For what you're doing the Comp High Energy H268 will work well, and have some romp to it. Another good choice would be the XE262. I have that one in my truck. run a louder muffler if you want sound.