Some of the site sponsors on here are the best in the biz IMO.
Wildcard Racing, FAST, HJR, M&M, Redline....etc.
I run a Wildcard Racing ported motor on my 06SE and couldn't be happier. Not saying anything bad about k&t, but I've raced a few k&t ported bikes with almost the same mods as me and they don't stand much of a chance.
You can't go wrong with any of the guys I listed, it just comes down to personal preference.