Jared, Nothing wrong with those heads either, just because they are a good deal doesn't mean they are not good. In testing with a tired stock 302 bottom end, procomp 190s and an x cam and a small nitrous hit, we made 445 rwhp, not to shabby if you ask me. We are putting those heads on a 351w in the next few weeks and are expecting to put a car in the 9's with them.
Back to your original question, in my opinion, even a professional products intake would be a step up, im not not crazy about that cobra intake.