I'd agree with DCOE's being a better choice if we were talking about twins, but single, I'm not convinced. You don't need the small chokes if you're only using one, they need to be larger as you're feeding adjacently firing cylinders. That they are firing adjacent cylinders isn't ideal either. I don't think you'll get that much extra performance to justify the cost. DCD's are great if you can find them and then find the appropriate parts to tune them, but DGV's are just so common.