Supercharger, Intake, Exhaust?

I have a 94 Silverado with the 5.7L 350 in it. I want to get more HP out of it. Well I have a set of stock heads that I'm gonna get ported and polished with Rocker rollers on it, and a few more valvtrain upgrades. I'm thinking about a supercharger to put on it, but i don't know what one. I'm leaning toward the Vortech, but I was wondering if anyone of you might know a better deal or supercharger. I want a new intake to go along with the heads and a new cam. I don't know waht ones to get, or what size cam to get. I also want to put headers on it, and get a set of duals strait off the headers. If anyone might have 2 cents to put into this thread I would be greatly appreciative. Thanks