i'm not a fan of the sniper unless it's used as part of the entire system. with that, you still need a tank and you still need a regulator so basically you're getting a pump and a sending unit. and to my knowledge the holley is proprietary pump or at least the connections so if it craps out, you're calling them for a replacement.
the tanks inc set up gives you a serviceable pump, a baffled tank, your choice of sender.
you're going to need a pump and a pick up either way along with the tank, so why not choose something that is designed to work together.