I agree with J-man and texasguy.
An improved pass rush is going to be necessary for the Texans to go 8-8, much less contend for the playoffs, but Babin isn't the biggest change in that regard for 2004.
Having a healthy Walker and Payne is more important than Babin.
Having a healthy secondary (especially Glenn) is more important than Babin.
Adding Robaire Smith is more important than Babin.
Don't get me wrong. I think Jason Babin can be a major contributor as a rookie. However, there are other factors that will be even more important to an improved pass rush in 2004.