That Photoshopped red notch looks like anodized red on billet aluminum. Niiiiiice!
Going 100% is hard because there's always a few details here and there that are hard to completely go over, and they tend to stick out. It's best to have a distracting contrast of some sort here and there, and if you're already mostly blacked-out, then a few stainless/chrome/polished/billet aluminum bits here and there are the most effective - eye-catching but not gawdy, as long as you keep 'em to a minimum. Sort of the thing I'm going for on mine ... except I'm stuck with a ghetto budget on a 250k mile car, so the effect isn't quite as stunning.
You've already got the stainless tailpipes goin' on, so either polish the lips of those Cobra R's or pick up a set of silver painted Cobra's and call it good. Black-over-red notches look nice, but it's way more work than you'd need to make your car look right - you've almost got it right where it should be right now, IMO.