Thinking of a more aero 2017.

Besides body position - which is generally free to work on, I'm wondering about other parts of the bike.

So I'm in the market for new handlebars, wondering if it's worth the $$ to get "aero" bars if the cables will be out in the wind anyway? (Tarmac SL4 - internal cable routing, but not Vias-like full internal routing).

And on that note, anyone have tips for tidying up cables that come out of the handlebar?

As for aero helmet, thinking of this one: Bontrager Ballista Road Helmet | Trek Bikes