UD4P is
faster than ASUS P6T Deluxe overall, has 3-way CrossFire/SLI support, and adequate cooling for the IOH (X58 chipset/northbridge).
One big tip: stay away from MSI X58 series boards (X58 Pro-E, X58M, X58 Platinum). Their IOH cooling is completely useless. I had one once, got rid of it in two days after finding out that my northbridge idled at 80C. It's not just me, it's wide spread, and MSI didn't address the issue properly at all, not even today. Sure the board has good performance and OC capability, but it also has this huge flaw.
Here,
here,
here, and
here are some proofs for just how wide spread the problem is.