I have a pacesetter header, I have had no problems with it. And I have never heard of the pacesetter cracking just the JBA. I would recomend you getting the coated one for durability and looks. The only draw back is the placement of the pipes that make some of the bolts difficuilt to get to. Other then that a really nice mod and gains.
I bought a pacesetter uncoated shorty and it was cracked when I recieved it. It was bad because I couldn't tell it was cracked until after I install it. I ended up replacing it with a focus central race header, which is great in my opinion. With this I'm not saying pacesetter is a bad way to go, you just get what you pay for.