New member with performance questions

Hey folks, I've been snooping around this site for a while and I finally decided to join. This is my first auto forum, so I'm stoked to get into the community. I've got a 2000 SE 4x4 with the 3.3L V6 and I'm looking to put an exhaust system on it. I already put a K&N intake on, and want to get the gains when the exhaust is opened up. I've looked at some Pacesetter headers and a Gibson exhaust, but I'd much rather prefer getting an opinion from an experienced community. Thanks for any advice and I'm looking forward to getting into the threads around here.