turbo inlet tubing, aluminum or stainless which one & why?

[mousetang]

I am planning on building my own twin turbo system for an 07' mustang, the turbos are going to be mid-mounted under the rear seat where the factory gas tank is now, should be a killer hidden system if all goes well. Was wanting input from those that have built their own or builds custom systems as which tubing is better to use and why?