For a this generation, no you don't need a tune at all. I mean if you want you might as well since you have the free tunes for life but I can't imagine them changing anything in a canned tune besides turning off the CEL.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.