headers are better than no headers. the real issue is some will leak a tad bit more than others.
thats really all it comes down to.
you got this guy above me telling you to spend more money. but he wont give a reason other than he spent a lot on his headers so you must also.
you wont find dyno numbers for all of them and they will all kill KR wonderfully.
i agree go big or go home, but i mean it in the sense of buy headers or go home.