Headers are not overkill, unless you consider most flow/hp/economy overkill. I think the Dutras are overkill on my wallet. 450 bux for a set of cast iron turds,no thank you.
Only if you're dumb enough to pay someone else to something you can do yourself or have done locally. Front casting = $200. Modified rear casting = $40 by a local welder. Cheaper than headers, and I GUARANTEE they'll outlast them by a few decades.
You want headers? GREAT. But don't dis the Dutras. They're a quality product, and PERFECT for 90% of the slants on the road today, most of which will never see a dragstrip.