Headers and custom tunes...worth the $$$ ?

[GQrider]

I currently have a 2006 F150 5.4L 2WD AFE Intake Tube only, Magnaflow Catback side exit, 2 LPD trans coolers, 4:10 Posi, Gryphon Custom tunes and its f*n awesome! I currently have 58k and have had this set up since 15k with no probs! My question is is it worth going for a header system like Banks Torque Tubes or should I go all out for a Dynatech Longtube Header System w/ tunes to match from Bill..? If the hp/tq is not really gonna change a whole lot, I may wanna just leave it alone. Any advice?