I came to really respect Intel's motherboards, after trying off-brands like Asus, Gigabyte, Epox, Tyan, etc...
Supermicro are the best, and most reliable. Intel's were pretty close as well, and very stable, and very well-supported. Eventually, I gave up on the off-brands because they were just not as stable. Although sometimes the Asus or Gigabytes would have features people would want, or higher performance, and then they'd be a good buy.
Intel leaving the motherboard business isn't a good thing for customers. You can still get Supermicro, but after that, you fall off the shelf. You're going to replace an Intel with a Biostar? Asus? ECS? I like Gigabyte for hobbyist stuff, but even then, it's not at that level. So, basically, you're going to have to get Supermicro now, or get a knock-off brand, without Intel in the middle. Supermicro is very expensive too, but if you need a real motherboard, you have no choice anymore.