Yeah unfortunately the Haswell chip does run hotter as the clocks get turned up, but the power usage is lower than Ivybridge. If you got some top tier cooling going on, your overclocking should be fine.
Also, a review of the Maximus VI Hero Intel Z87 is out from LegitReviews, http://www.legitreviews.com/article/2200/20/
- Sums up that the Hero is a great "Value" ROG motherboard and preforms extremely well. Price point is $220 for this board, while the Sabertooth is closer to $280. If I can snag the Hero in a bundle deal for around $200, I would definitely do it. Just my 2 cents.