Hothardware published a review of the Asus P5E3 Premium and Maximus Extreme motherboards.

Quote from the review: "We evaluate the features, overclockability, and performance of two of Asus’ premiere motherboards for the Intel platform, the X48-based P5E3 Premium and the X38-based Maximus Extreme. These two motherboards are family members of two different series of products by Asus – R.O.G. and Ai Lifestyle – and as such they each offer a different mix of features and integrated peripherals.
They’re both high-end motherboards targeted at enthusiasts and power users, however."
Read the full review on Hothardware. Get your Motherboards on NewEgg.