A disc vs a deep wheel is worth a very limited number of watts, so i'd start by not buying a 26mm wheel, as this can't possibly be optimized for a 28C tyre, let alone 30 or 32, at which point, if that negates half the aero gains of the disc, you're really shooting yourself in the foot.
And if you're solving for cool factor, afaik, a real disc sounds like a disc, but a wheel with a disc cover doesnt nearly as much. And the sound of a disc is probably half its cool factor?