Let's get this out of the way first: (1) The icon theme created by the elementary team is by far the best icon theme we've used. It's just a bit lacking. (2) The Elementary Extras project is incredibly promising, but it has a ways to go.
In the meantime, El Faenza combines the elementary theme with Faenza icons to bridge the gap that currently exists. Take a look at the screenshot below.
gksudo pantheon-filesPaste the extracted elFaenza folder into /usr/share/icons/.
To activate the theme, select the elFaenza icon theme using Ubuntu Tweak.