So there are two resonator boxes, the small one by the throttle body and the large one in the guard?

At this point it's sounding like:

Piece of pipe from near lights -> Airbox with nice new panel filter and sensors all connected -> piece of pipe -> throttle body

I think that's a good mix between ease, expense and sound while keeping all the sensors intact so I don't have to worry about the idle issues.

Also, I don't suppose you know what diameter I'll need?

Thanks again for your help!