Best exhaust system?

hey guys, this is is my first post so yeah. Anyways! I recently just got my truck a few months ago and I’m making it a little project because I’m my state I’ve never seen one before but I’ve seen pictures and first gens look bad*** when they are modded out. So recently I noticed a popping sound that was coming from my exhaust when I pushed the throttle all the way down and I took it for a few inspections and what I’ve came down to was the first cat convertor is clogged! It still runs fine but when I hit the throttle all the way down sometimes it will take a second to shoot off. So I’ve tried a cat cleaner and it didn’t work for more than a day so I think I’m just gonna have to go ahead and say F*** it and buy a new exhaust but I want some performance. What is the best exhaust system out there and where can I find it? (Please post links to where you got them or atleast the website name)