There *is* stuff that is better, but you have to decide how much money you want to spend and what you are looking to get out of it. If you are looking to get really nice hp gains, you'd want an Arata, but they are NOT cheap. Ti Force is really nice also. It all comes down to whether you want to spend the $$$ for the "ferrari" of an exhaust system, or if you have a budget and just want to get the most out of your exhaust with the budget you have. Stock systems are getting better and better, and the power increases are getting tougher to find. Can't wait to see what stock systems are like in a couple of years. Also, jeeps is right, any full system will probably give you more than you already have.
--Laura