Billy Carrion

Hello I am new to ford's and pickup trucks in general. I am looking for a clear answer on whether to just buy a stock exhaust manifold or invest a bit more money on a header of any type (short/long). My current exhaust manifold has a leak so I need to change it. I am just looking for the OPTIONS if anyone could give me a suggestion or link of what "their" opinions is it would be extremely appreciated.

2003 ford F150 supercab crew 4.6l