I would still say go for the non-reference, just because they are quieter and run cooler. My 6950 runs in a very cool case, but still gets up to like 70-75C when I game for awhile. And the cooler sounds like a jet.
Non-reference will generally run cooler.
And while you may think the Aurora doesnt cool well, the thing it does have is space. Where my case is small, your case is large and will probably manage heat generated better. http://www.tomshardware.com/reviews/geforce-gtx-670-test-review,3217.html
Here's an article pitting up a few GTX670's. You can see the reference model is in there too if you just skim it. The reference model does not cool as well.