I had the same question with a poll on here recently, here's the link:
https://ls1tech.com/forums/generatio...vs-hooker.html. I went with LPP. I just got them Thursday and I'm putting them on in a couple of weeks. For about the same price, how could you pass up a deal for stainless? Also, I've heard very good things about the fitment on them and all the LS1 guys with them so far have been happy. Also, they've got the merge and spike too which the Hookers don't. My brother just bought a 98 SS that has pacesetters on there and just were just installed like last summer and there is ready a little surface rust on the ory and headers and it hasn't been driven in salt or anything.
Also, a big factor for me is Hooker doesn't make a race header. I know you said you wanted a race header, so if you do, Hooker isn't a choice, you would have to get block off plates.
Hope that helps.